MemoryError saving maps in sessions

[chimerax-bug-report@…]

The following bug report has been submitted:
Platform:        Windows-10-10.0.19044
ChimeraX Version: 1.4 (2022-06-03 23:39:42 UTC)
Description
(Describe the actions that caused this problem to occur here)

Log:
UCSF ChimeraX version: 1.4 (2022-06-03)  
© 2016-2022 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  

> open
> D:\\\map\\\20230414_Janelia_11b8_open\\\LBD_TMD_11b8_open_Janelia_552-coot-21.pdb

Chain information for LBD_TMD_11b8_open_Janelia_552-coot-21.pdb #1  
---  
Chain | Description  
A | No description available  
B | No description available  
C | No description available  
D | No description available  
E | No description available  
F | No description available  
G | No description available  
H | No description available  
I | No description available  
  

> show cartoons

> hide atoms

> cartoon style modeHelix tube sides 20

> dssp

> set bgColor white

> lighting soft

> open D:/map/20221118_Janelia_dataset_11b8/6dlz.pdb

6dlz.pdb title:  
Open state GLUA2 In complex with STZ after micelle signal subtraction [more
info...]  
  
Chain information for 6dlz.pdb #2  
---  
Chain | Description | UniProt  
A | glutamate receptor 2,voltage-dependent calcium channel γ-2 subunit |
CCG2_HUMAN  
B D | glutamate receptor 2,voltage-dependent calcium channel γ-2 subunit |
CCG2_HUMAN  
C | glutamate receptor 2,voltage-dependent calcium channel γ-2 subunit |
CCG2_HUMAN  
  
Non-standard residues in 6dlz.pdb #2  
---  
CYZ — cyclothiazide (3-bicyclo[2.2.1]hept-5-en-2-yl-6-chloro-3,4-
dihydro-2H-1,2,4-benzothiadiazine-7-sulfonamide 1,1 dioxide)  
  

> mmaker #5 to #1

No molecules/chains to match specified  

> mmaker #2 to #1

Parameters  
---  
Chain pairing | bb  
Alignment algorithm | Needleman-Wunsch  
Similarity matrix | BLOSUM-62  
SS fraction | 0.3  
Gap open (HH/SS/other) | 18/18/6  
Gap extend | 1  
SS matrix |  |  | H | S | O  
---|---|---|---  
H | 6 | -9 | -6  
S |  | 6 | -6  
O |  |  | 4  
Iteration cutoff | 2  
  
Matchmaker LBD_TMD_11b8_open_Janelia_552-coot-21.pdb, chain B (#1) with
6dlz.pdb, chain A (#2), sequence alignment score = 1659.7  
RMSD between 238 pruned atom pairs is 1.028 angstroms; (across all 395 pairs:
16.307)  
  

> mmaker #2 to #1

Parameters  
---  
Chain pairing | bb  
Alignment algorithm | Needleman-Wunsch  
Similarity matrix | BLOSUM-62  
SS fraction | 0.3  
Gap open (HH/SS/other) | 18/18/6  
Gap extend | 1  
SS matrix |  |  | H | S | O  
---|---|---|---  
H | 6 | -9 | -6  
S |  | 6 | -6  
O |  |  | 4  
Iteration cutoff | 2  
  
Matchmaker LBD_TMD_11b8_open_Janelia_552-coot-21.pdb, chain B (#1) with
6dlz.pdb, chain A (#2), sequence alignment score = 1659.7  
RMSD between 238 pruned atom pairs is 1.028 angstroms; (across all 395 pairs:
16.307)  
  

> mmaker #2/A to #1/A

Parameters  
---  
Chain pairing | bb  
Alignment algorithm | Needleman-Wunsch  
Similarity matrix | BLOSUM-62  
SS fraction | 0.3  
Gap open (HH/SS/other) | 18/18/6  
Gap extend | 1  
SS matrix |  |  | H | S | O  
---|---|---|---  
H | 6 | -9 | -6  
S |  | 6 | -6  
O |  |  | 4  
Iteration cutoff | 2  
  
Matchmaker LBD_TMD_11b8_open_Janelia_552-coot-21.pdb, chain A (#1) with
6dlz.pdb, chain A (#2), sequence alignment score = 1633.7  
RMSD between 282 pruned atom pairs is 1.153 angstroms; (across all 398 pairs:
5.085)  
  

> mmaker #2 to #1

Parameters  
---  
Chain pairing | bb  
Alignment algorithm | Needleman-Wunsch  
Similarity matrix | BLOSUM-62  
SS fraction | 0.3  
Gap open (HH/SS/other) | 18/18/6  
Gap extend | 1  
SS matrix |  |  | H | S | O  
---|---|---|---  
H | 6 | -9 | -6  
S |  | 6 | -6  
O |  |  | 4  
Iteration cutoff | 2  
  
Matchmaker LBD_TMD_11b8_open_Janelia_552-coot-21.pdb, chain B (#1) with
6dlz.pdb, chain A (#2), sequence alignment score = 1659.7  
RMSD between 238 pruned atom pairs is 1.028 angstroms; (across all 395 pairs:
16.307)  
  

> mmaker #2/A to #1/A

Parameters  
---  
Chain pairing | bb  
Alignment algorithm | Needleman-Wunsch  
Similarity matrix | BLOSUM-62  
SS fraction | 0.3  
Gap open (HH/SS/other) | 18/18/6  
Gap extend | 1  
SS matrix |  |  | H | S | O  
---|---|---|---  
H | 6 | -9 | -6  
S |  | 6 | -6  
O |  |  | 4  
Iteration cutoff | 2  
  
Matchmaker LBD_TMD_11b8_open_Janelia_552-coot-21.pdb, chain A (#1) with
6dlz.pdb, chain A (#2), sequence alignment score = 1633.7  
RMSD between 282 pruned atom pairs is 1.153 angstroms; (across all 398 pairs:
5.085)  
  

> cartoon style modeHelix tube sides 20

Drag select of 1524 residues  

> select up

11896 atoms, 12129 bonds, 1496 residues, 1 model selected  

> select up

17140 atoms, 17512 bonds, 2160 residues, 1 model selected  

> select down

11896 atoms, 12129 bonds, 1496 residues, 1 model selected  

> hide sel cartoons

> select up

17140 atoms, 17512 bonds, 2160 residues, 1 model selected  

> select clear

Drag select of 2 residues  

> hide sel cartoons

Drag select of 8 residues  

> select up

119 atoms, 120 bonds, 13 residues, 1 model selected  

> select up

4289 atoms, 4382 bonds, 540 residues, 1 model selected  

> select down

119 atoms, 120 bonds, 13 residues, 1 model selected  

> hide sel cartoons

> select #2/A:237

11 atoms, 11 bonds, 1 residue, 1 model selected  

> select up

33 atoms, 33 bonds, 5 residues, 1 model selected  

> hide sel cartoons

Drag select of 17 residues  

> select up

180 atoms, 180 bonds, 22 residues, 1 model selected  

> hide sel cartoons

> ui tool show "Side View"

> hide #!1 models

> show #!1 models

> cartoon style sel xsection rectangle modeHelix default

> select clear

> cartoon style xsection rectangle modeHelix default

> dssp

> cartoon style modeHelix tube sides 20

> hide #!1 models

> show #!1 models

> cartoon style xsection oval modeHelix default

> hide #!2 models

> open D:/map/20230414_Janelia_11b8_open/cryosparc_P295_J546_map_sharp.mrc

Opened cryosparc_P295_J546_map_sharp.mrc as #3, grid size 512,512,512, pixel
0.831, shown at level 0.000787, step 2, values float32  

> volume #3 level 0.05724

> volume #3 step 1

> volume #3 level 0.1636

> volume #3 level 0.1451

> ui tool show "Hide Dust"

> surface dust #3 size 4.99

> surface dust #3 size 3

[Repeated 1 time(s)]

> dssp

> surface dust #3 size 4

[Repeated 1 time(s)]

> dssp

> volume #3 level 0.1729

> select add #1/H:140

5 atoms, 4 bonds, 1 residue, 1 model selected  

> select add #1/G:102

13 atoms, 11 bonds, 2 residues, 1 model selected  

> select up

441 atoms, 460 bonds, 49 residues, 1 model selected  

> select up

682 atoms, 708 bonds, 79 residues, 1 model selected  

> select up

720 atoms, 745 bonds, 83 residues, 1 model selected  

> select up

1657 atoms, 1719 bonds, 194 residues, 1 model selected  

> select up

1665 atoms, 1726 bonds, 195 residues, 1 model selected  

> select up

1935 atoms, 2006 bonds, 228 residues, 1 model selected  

> ui tool show "Color Actions"

> color sel tan

> select #1/F:35

12 atoms, 12 bonds, 1 residue, 1 model selected  

> select add #1/E:40

18 atoms, 17 bonds, 2 residues, 1 model selected  

> select up

181 atoms, 180 bonds, 23 residues, 1 model selected  

> select up

2195 atoms, 2248 bonds, 282 residues, 1 model selected  

> color sel hot pink

> select clear

> select add #1/F:57

7 atoms, 6 bonds, 1 residue, 1 model selected  

> select add #1/E:79

16 atoms, 14 bonds, 2 residues, 1 model selected  

> select up

62 atoms, 61 bonds, 8 residues, 1 model selected  

> select up

2195 atoms, 2248 bonds, 282 residues, 1 model selected  

> color sel pale violet red

> select clear

> hide #!3 models

> dssp

> close #1

> open
> D:/map/20230414_Janelia_11b8_open/LBD_TMD_11b8_open_Janelia_552-coot-21.pdb

Chain information for LBD_TMD_11b8_open_Janelia_552-coot-21.pdb #1  
---  
Chain | Description  
A | No description available  
B | No description available  
C | No description available  
D | No description available  
E | No description available  
F | No description available  
G | No description available  
H | No description available  
I | No description available  
  

> show #!1 cartoons

> hide #!1 atoms

> close #1

> open
> D:/map/20230414_Janelia_11b8_open/LBD_TMD_11b8_open_Janelia_552-coot-21.pdb

Summary of feedback from opening
D:/map/20230414_Janelia_11b8_open/LBD_TMD_11b8_open_Janelia_552-coot-21.pdb  
---  
warnings | End residue of secondary structure not found: HELIX 55 55 LEU D 596
PHE D 618 1 23  
End residue of secondary structure not found: HELIX 69 69 LEU B 596 PHE B 618
1 23  
  
Chain information for LBD_TMD_11b8_open_Janelia_552-coot-21.pdb #1  
---  
Chain | Description  
A | No description available  
B | No description available  
C | No description available  
D | No description available  
E | No description available  
F | No description available  
G | No description available  
H | No description available  
I | No description available  
  

> show #!1 cartoons

> hide #!1 atoms

> close #1

> open
> D:/map/20230414_Janelia_11b8_open/LBD_TMD_11b8_open_Janelia_552-coot-21.pdb

Chain information for LBD_TMD_11b8_open_Janelia_552-coot-21.pdb #1  
---  
Chain | Description  
A | No description available  
B | No description available  
C | No description available  
D | No description available  
E | No description available  
F | No description available  
G | No description available  
H | No description available  
I | No description available  
  

> show #!1 cartoons

> hide #!1 atoms

> select add #1/I:564

7 atoms, 6 bonds, 1 residue, 1 model selected  

> select up

192 atoms, 195 bonds, 25 residues, 1 model selected  

> delete atoms sel

> delete bonds sel

> select add #1/H:151

12 atoms, 12 bonds, 1 residue, 1 model selected  

> select add #1/G:98

20 atoms, 19 bonds, 2 residues, 1 model selected  

> select up

441 atoms, 460 bonds, 49 residues, 1 model selected  

> select up

682 atoms, 708 bonds, 79 residues, 1 model selected  

> select up

709 atoms, 734 bonds, 82 residues, 1 model selected  

> select up

1657 atoms, 1719 bonds, 194 residues, 1 model selected  

> select up

1674 atoms, 1735 bonds, 196 residues, 1 model selected  

> select up

1935 atoms, 2006 bonds, 228 residues, 1 model selected  

> color sel burly wood

> color sel tan

> color sel burly wood

> select clear

> select #1/F:11

8 atoms, 7 bonds, 1 residue, 1 model selected  

> select add #1/E:97

19 atoms, 18 bonds, 2 residues, 1 model selected  

> select up

269 atoms, 272 bonds, 35 residues, 1 model selected  

> select up

2497 atoms, 2558 bonds, 321 residues, 1 model selected  

> select up

2541 atoms, 2604 bonds, 326 residues, 1 model selected  

> select up

3090 atoms, 3165 bonds, 397 residues, 1 model selected  

> select up

16647 atoms, 17044 bonds, 2203 residues, 1 model selected  

> select down

3090 atoms, 3165 bonds, 397 residues, 1 model selected  

> color sel pale violet red

> select clear

> select add #1/C:809

7 atoms, 6 bonds, 1 residue, 1 model selected  

> select up

198 atoms, 201 bonds, 27 residues, 1 model selected  

> select up

257 atoms, 260 bonds, 37 residues, 1 model selected  

> select up

338 atoms, 340 bonds, 45 residues, 1 model selected  

> select up

1615 atoms, 1648 bonds, 219 residues, 1 model selected  

> select up

1673 atoms, 1705 bonds, 227 residues, 1 model selected  

> select up

1764 atoms, 1799 bonds, 239 residues, 1 model selected  

> select up

1770 atoms, 1804 bonds, 240 residues, 1 model selected  

> select up

2919 atoms, 2982 bonds, 394 residues, 1 model selected  

> color sel cornflower blue

> color sel medium slate blue

> color sel cornflower blue

> select clear

> select add #1/D:691

5 atoms, 4 bonds, 1 residue, 1 model selected  

> select up

62 atoms, 61 bonds, 9 residues, 1 model selected  

> select up

1323 atoms, 1349 bonds, 180 residues, 1 model selected  

> select up

1406 atoms, 1430 bonds, 192 residues, 1 model selected  

> select up

1736 atoms, 1769 bonds, 238 residues, 1 model selected  

> select up

1741 atoms, 1773 bonds, 239 residues, 1 model selected  

> select up

2859 atoms, 2920 bonds, 389 residues, 1 model selected  

> select up

2868 atoms, 2928 bonds, 390 residues, 1 model selected  

> select up

16647 atoms, 17044 bonds, 2203 residues, 1 model selected  

> select down

2868 atoms, 2928 bonds, 390 residues, 1 model selected  

> color sel medium slate blue

> color sel blue violet

> color sel dark violet

> color sel medium orchid

> select add #1/B:641

2873 atoms, 2932 bonds, 391 residues, 1 model selected  

> select up

2913 atoms, 2972 bonds, 397 residues, 1 model selected  

> select up

4195 atoms, 4284 bonds, 572 residues, 1 model selected  

> select up

4278 atoms, 4365 bonds, 584 residues, 1 model selected  

> select up

4611 atoms, 4707 bonds, 630 residues, 1 model selected  

> select up

4627 atoms, 4722 bonds, 632 residues, 1 model selected  

> select up

5762 atoms, 5886 bonds, 785 residues, 1 model selected  

> select up

16647 atoms, 17044 bonds, 2203 residues, 1 model selected  

> select up

47717 atoms, 48802 bonds, 6148 residues, 4 models selected  

> select down

16647 atoms, 17044 bonds, 2203 residues, 1 model selected  

> color sel dark orchid

> undo

> select down

5762 atoms, 5886 bonds, 785 residues, 1 model selected  

> select down

4627 atoms, 4722 bonds, 632 residues, 1 model selected  

> select down

4611 atoms, 4707 bonds, 630 residues, 1 model selected  

> select clear

> select add #1/B:641

5 atoms, 4 bonds, 1 residue, 1 model selected  

> select up

45 atoms, 44 bonds, 7 residues, 1 model selected  

> select up

1327 atoms, 1356 bonds, 182 residues, 1 model selected  

> select up

1410 atoms, 1437 bonds, 194 residues, 1 model selected  

> select up

1743 atoms, 1779 bonds, 240 residues, 1 model selected  

> select up

1759 atoms, 1794 bonds, 242 residues, 1 model selected  

> select up

2894 atoms, 2958 bonds, 395 residues, 1 model selected  

> color sel dark orchid

> select add #1/A:657

2903 atoms, 2966 bonds, 396 residues, 1 model selected  

> select clear

> select add #1/A:657

9 atoms, 8 bonds, 1 residue, 1 model selected  

> select up

71 atoms, 72 bonds, 9 residues, 1 model selected  

> select up

1314 atoms, 1343 bonds, 181 residues, 1 model selected  

> select up

1409 atoms, 1436 bonds, 196 residues, 1 model selected  

> select up

1747 atoms, 1783 bonds, 242 residues, 1 model selected  

> select up

1794 atoms, 1829 bonds, 245 residues, 1 model selected  

> select up

2941 atoms, 3005 bonds, 399 residues, 1 model selected  

> color sel khaki

> select clear

> select ::name="FWF"

64 atoms, 66 bonds, 2 residues, 1 model selected  

> color sel lime

> select clear

> select #1/A:1001 | /C:1001 | /B:901 | /D:901

36 atoms, 32 bonds, 4 residues, 1 model selected  

> show sel atoms

> style sel stick

Changed 36 atom styles  

> color sel cyan

> color sel lime

> select clear

> show #!3 models

> ui tool show "Hide Dust"

> surface undust #3

> volume #3 level 0.09425

> volume #3 level 0.07574

> volume #3 level 0.06187

> volume #3 level 0.08

> ui tool show "Color Zone"

> color zone #3 near #1 distance 4.99

> volume splitbyzone #3

Opened cryosparc_P295_J546_map_sharp.mrc 0 as #4.1, grid size 512,512,512,
pixel 0.831, shown at level 0.08, step 1, values float32  
Opened cryosparc_P295_J546_map_sharp.mrc 1 as #4.2, grid size 512,512,512,
pixel 0.831, shown at level 0.08, step 1, values float32  
Opened cryosparc_P295_J546_map_sharp.mrc 2 as #4.3, grid size 512,512,512,
pixel 0.831, shown at level 0.08, step 1, values float32  
Opened cryosparc_P295_J546_map_sharp.mrc 3 as #4.4, grid size 512,512,512,
pixel 0.831, shown at level 0.08, step 1, values float32  
Opened cryosparc_P295_J546_map_sharp.mrc 4 as #4.5, grid size 512,512,512,
pixel 0.831, shown at level 0.08, step 1, values float32  
Opened cryosparc_P295_J546_map_sharp.mrc 5 as #4.6, grid size 512,512,512,
pixel 0.831, shown at level 0.08, step 1, values float32  
Opened cryosparc_P295_J546_map_sharp.mrc 6 as #4.7, grid size 512,512,512,
pixel 0.831, shown at level 0.08, step 1, values float32  
Opened cryosparc_P295_J546_map_sharp.mrc 7 as #4.8, grid size 512,512,512,
pixel 0.831, shown at level 0.08, step 1, values float32  

> save D:/map/20230414_Janelia_11b8_open/overall.cxs includeMaps true

Traceback (most recent call last):  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 285, in process  
data = sm.take_snapshot(obj, session, self.state_flags)  
File "D:\software\ChimeraX 1.4\bin\lib\site-packages\chimerax\map\session.py",
line 200, in take_snapshot  
data = state_from_grid_data(self.grid_data, session_path =
session.session_file_path,  
File "D:\software\ChimeraX 1.4\bin\lib\site-packages\chimerax\map\session.py",
line 310, in state_from_grid_data  
bytes = dt.matrix().tobytes()  
MemoryError  
  
The above exception was the direct cause of the following exception:  
  
Traceback (most recent call last):  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 262, in discovery  
self.processed[key] = self.process(obj, parents)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 290, in process  
raise RuntimeError(msg) from e  
RuntimeError: Error while saving session data for 'models' ->
<chimerax.core.models.Models object at 0x000001AEBFCF2DF0> ->
<chimerax.map.volume.VolumeSurface object at 0x000001AE8C83C670> 'surface' ->
<chimerax.map.volume.Volume object at 0x000001AE8A8F9580>
'cryosparc_P295_J546_map_sharp.mrc 6' -> <chimerax.map.session.GridDataState
object at 0x000001AE8A7F6460>  
  
During handling of the above exception, another exception occurred:  
  
Traceback (most recent call last):  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 896, in save  
session.save(output, version=version, include_maps=include_maps)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 625, in save  
mgr.discovery(self._state_containers)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 266, in discovery  
raise ValueError("error processing: %s: %s" % (_obj_stack(parents, obj), e))  
ValueError: error processing: 'models' -> <chimerax.core.models.Models object
at 0x000001AEBFCF2DF0> -> <chimerax.map.volume.VolumeSurface object at
0x000001AE8C83C670> 'surface' -> <chimerax.map.volume.Volume object at
0x000001AE8A8F9580> 'cryosparc_P295_J546_map_sharp.mrc 6' ->
<chimerax.map.session.GridDataState object at 0x000001AE8A7F6460>: Error while
saving session data for 'models' -> <chimerax.core.models.Models object at
0x000001AEBFCF2DF0> -> <chimerax.map.volume.VolumeSurface object at
0x000001AE8C83C670> 'surface' -> <chimerax.map.volume.Volume object at
0x000001AE8A8F9580> 'cryosparc_P295_J546_map_sharp.mrc 6' ->
<chimerax.map.session.GridDataState object at 0x000001AE8A7F6460>  
  
ValueError: error processing: 'models' -> -> 'surface' ->
'cryosparc_P295_J546_map_sharp.mrc 6' -> : Error while saving session data for
'models' -> -> 'surface' -> 'cryosparc_P295_J546_map_sharp.mrc 6' ->  
  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 266, in discovery  
raise ValueError("error processing: %s: %s" % (_obj_stack(parents, obj), e))  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 285, in process  
data = sm.take_snapshot(obj, session, self.state_flags)  
File "D:\software\ChimeraX 1.4\bin\lib\site-packages\chimerax\map\session.py",
line 200, in take_snapshot  
data = state_from_grid_data(self.grid_data, session_path =
session.session_file_path,  
File "D:\software\ChimeraX 1.4\bin\lib\site-packages\chimerax\map\session.py",
line 310, in state_from_grid_data  
bytes = dt.matrix().tobytes()  
MemoryError  
  
The above exception was the direct cause of the following exception:  
  
Traceback (most recent call last):  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 262, in discovery  
self.processed[key] = self.process(obj, parents)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 290, in process  
raise RuntimeError(msg) from e  
RuntimeError: Error while saving session data for 'models' ->
<chimerax.core.models.Models object at 0x000001AEBFCF2DF0> ->
<chimerax.map.volume.VolumeSurface object at 0x000001AE8C83C670> 'surface' ->
<chimerax.map.volume.Volume object at 0x000001AE8A8F9580>
'cryosparc_P295_J546_map_sharp.mrc 6' -> <chimerax.map.session.GridDataState
object at 0x000001AE8A7F6460>  
  
During handling of the above exception, another exception occurred:  
  
Traceback (most recent call last):  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\toolbar\tool.py", line 165, in callback  
bundle_info.run_provider(session, name, session.toolbar,
display_name=display_name)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\toolshed\info.py", line 386, in run_provider  
return api._api_caller.run_provider(api, session, name, mgr, **kw)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\toolshed\\__init__.py", line 1286, in run_provider  
return cls._get_func(api, "run_provider")(session, name, mgr, **kw)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\toolbar\\__init__.py", line 37, in run_provider  
providers.run_provider(session, name)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\toolbar\providers.py", line 45, in run_provider  
what(session)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\toolbar\providers.py", line 27, in _file_save  
show_save_file_dialog(session)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\save_command\dialog.py", line 127, in show_save_file_dialog  
_dlg.display(session, **kw)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\save_command\dialog.py", line 51, in display  
run(session, cmd)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\commands\run.py", line 38, in run  
results = command.run(text, log=log, return_json=return_json)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\commands\cli.py", line 2897, in run  
result = ci.function(session, **kw_args)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\save_command\cmd.py", line 75, in cmd_save  
Command(session, registry=registry).run(provider_cmd_text, log=log)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\commands\cli.py", line 2897, in run  
result = ci.function(session, **kw_args)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\save_command\cmd.py", line 90, in provider_save  
saver_info.save(session, path, **provider_kw)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core_formats\\__init__.py", line 84, in save  
return cxs_save(session, path, **kw)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 896, in save  
session.save(output, version=version, include_maps=include_maps)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 625, in save  
mgr.discovery(self._state_containers)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 266, in discovery  
raise ValueError("error processing: %s: %s" % (_obj_stack(parents, obj), e))  
ValueError: error processing: 'models' -> <chimerax.core.models.Models object
at 0x000001AEBFCF2DF0> -> <chimerax.map.volume.VolumeSurface object at
0x000001AE8C83C670> 'surface' -> <chimerax.map.volume.Volume object at
0x000001AE8A8F9580> 'cryosparc_P295_J546_map_sharp.mrc 6' ->
<chimerax.map.session.GridDataState object at 0x000001AE8A7F6460>: Error while
saving session data for 'models' -> <chimerax.core.models.Models object at
0x000001AEBFCF2DF0> -> <chimerax.map.volume.VolumeSurface object at
0x000001AE8C83C670> 'surface' -> <chimerax.map.volume.Volume object at
0x000001AE8A8F9580> 'cryosparc_P295_J546_map_sharp.mrc 6' ->
<chimerax.map.session.GridDataState object at 0x000001AE8A7F6460>  
  
ValueError: error processing: 'models' -> -> 'surface' ->
'cryosparc_P295_J546_map_sharp.mrc 6' -> : Error while saving session data for
'models' -> -> 'surface' -> 'cryosparc_P295_J546_map_sharp.mrc 6' ->  
  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 266, in discovery  
raise ValueError("error processing: %s: %s" % (_obj_stack(parents, obj), e))  
  
See log for complete Python traceback.  
  

> help help:user

> save D:/map/20230414_Janelia_11b8_open/overall.cxs includeMaps true

Traceback (most recent call last):  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 285, in process  
data = sm.take_snapshot(obj, session, self.state_flags)  
File "D:\software\ChimeraX 1.4\bin\lib\site-packages\chimerax\map\session.py",
line 200, in take_snapshot  
data = state_from_grid_data(self.grid_data, session_path =
session.session_file_path,  
File "D:\software\ChimeraX 1.4\bin\lib\site-packages\chimerax\map\session.py",
line 310, in state_from_grid_data  
bytes = dt.matrix().tobytes()  
MemoryError  
  
The above exception was the direct cause of the following exception:  
  
Traceback (most recent call last):  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 262, in discovery  
self.processed[key] = self.process(obj, parents)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 290, in process  
raise RuntimeError(msg) from e  
RuntimeError: Error while saving session data for 'models' ->
<chimerax.core.models.Models object at 0x000001AEBFCF2DF0> ->
<chimerax.map.volume.VolumeSurface object at 0x000001AE8C83C670> 'surface' ->
<chimerax.map.volume.Volume object at 0x000001AE8A8F9580>
'cryosparc_P295_J546_map_sharp.mrc 6' -> <chimerax.map.session.GridDataState
object at 0x000001AE8CC58850>  
  
During handling of the above exception, another exception occurred:  
  
Traceback (most recent call last):  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 896, in save  
session.save(output, version=version, include_maps=include_maps)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 625, in save  
mgr.discovery(self._state_containers)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 266, in discovery  
raise ValueError("error processing: %s: %s" % (_obj_stack(parents, obj), e))  
ValueError: error processing: 'models' -> <chimerax.core.models.Models object
at 0x000001AEBFCF2DF0> -> <chimerax.map.volume.VolumeSurface object at
0x000001AE8C83C670> 'surface' -> <chimerax.map.volume.Volume object at
0x000001AE8A8F9580> 'cryosparc_P295_J546_map_sharp.mrc 6' ->
<chimerax.map.session.GridDataState object at 0x000001AE8CC58850>: Error while
saving session data for 'models' -> <chimerax.core.models.Models object at
0x000001AEBFCF2DF0> -> <chimerax.map.volume.VolumeSurface object at
0x000001AE8C83C670> 'surface' -> <chimerax.map.volume.Volume object at
0x000001AE8A8F9580> 'cryosparc_P295_J546_map_sharp.mrc 6' ->
<chimerax.map.session.GridDataState object at 0x000001AE8CC58850>  
  
ValueError: error processing: 'models' -> -> 'surface' ->
'cryosparc_P295_J546_map_sharp.mrc 6' -> : Error while saving session data for
'models' -> -> 'surface' -> 'cryosparc_P295_J546_map_sharp.mrc 6' ->  
  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 266, in discovery  
raise ValueError("error processing: %s: %s" % (_obj_stack(parents, obj), e))  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 285, in process  
data = sm.take_snapshot(obj, session, self.state_flags)  
File "D:\software\ChimeraX 1.4\bin\lib\site-packages\chimerax\map\session.py",
line 200, in take_snapshot  
data = state_from_grid_data(self.grid_data, session_path =
session.session_file_path,  
File "D:\software\ChimeraX 1.4\bin\lib\site-packages\chimerax\map\session.py",
line 310, in state_from_grid_data  
bytes = dt.matrix().tobytes()  
MemoryError  
  
The above exception was the direct cause of the following exception:  
  
Traceback (most recent call last):  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 262, in discovery  
self.processed[key] = self.process(obj, parents)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 290, in process  
raise RuntimeError(msg) from e  
RuntimeError: Error while saving session data for 'models' ->
<chimerax.core.models.Models object at 0x000001AEBFCF2DF0> ->
<chimerax.map.volume.VolumeSurface object at 0x000001AE8C83C670> 'surface' ->
<chimerax.map.volume.Volume object at 0x000001AE8A8F9580>
'cryosparc_P295_J546_map_sharp.mrc 6' -> <chimerax.map.session.GridDataState
object at 0x000001AE8CC58850>  
  
During handling of the above exception, another exception occurred:  
  
Traceback (most recent call last):  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\toolbar\tool.py", line 165, in callback  
bundle_info.run_provider(session, name, session.toolbar,
display_name=display_name)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\toolshed\info.py", line 386, in run_provider  
return api._api_caller.run_provider(api, session, name, mgr, **kw)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\toolshed\\__init__.py", line 1286, in run_provider  
return cls._get_func(api, "run_provider")(session, name, mgr, **kw)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\toolbar\\__init__.py", line 37, in run_provider  
providers.run_provider(session, name)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\toolbar\providers.py", line 45, in run_provider  
what(session)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\toolbar\providers.py", line 27, in _file_save  
show_save_file_dialog(session)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\save_command\dialog.py", line 127, in show_save_file_dialog  
_dlg.display(session, **kw)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\save_command\dialog.py", line 51, in display  
run(session, cmd)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\commands\run.py", line 38, in run  
results = command.run(text, log=log, return_json=return_json)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\commands\cli.py", line 2897, in run  
result = ci.function(session, **kw_args)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\save_command\cmd.py", line 75, in cmd_save  
Command(session, registry=registry).run(provider_cmd_text, log=log)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\commands\cli.py", line 2897, in run  
result = ci.function(session, **kw_args)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\save_command\cmd.py", line 90, in provider_save  
saver_info.save(session, path, **provider_kw)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core_formats\\__init__.py", line 84, in save  
return cxs_save(session, path, **kw)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 896, in save  
session.save(output, version=version, include_maps=include_maps)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 625, in save  
mgr.discovery(self._state_containers)  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 266, in discovery  
raise ValueError("error processing: %s: %s" % (_obj_stack(parents, obj), e))  
ValueError: error processing: 'models' -> <chimerax.core.models.Models object
at 0x000001AEBFCF2DF0> -> <chimerax.map.volume.VolumeSurface object at
0x000001AE8C83C670> 'surface' -> <chimerax.map.volume.Volume object at
0x000001AE8A8F9580> 'cryosparc_P295_J546_map_sharp.mrc 6' ->
<chimerax.map.session.GridDataState object at 0x000001AE8CC58850>: Error while
saving session data for 'models' -> <chimerax.core.models.Models object at
0x000001AEBFCF2DF0> -> <chimerax.map.volume.VolumeSurface object at
0x000001AE8C83C670> 'surface' -> <chimerax.map.volume.Volume object at
0x000001AE8A8F9580> 'cryosparc_P295_J546_map_sharp.mrc 6' ->
<chimerax.map.session.GridDataState object at 0x000001AE8CC58850>  
  
ValueError: error processing: 'models' -> -> 'surface' ->
'cryosparc_P295_J546_map_sharp.mrc 6' -> : Error while saving session data for
'models' -> -> 'surface' -> 'cryosparc_P295_J546_map_sharp.mrc 6' ->  
  
File "D:\software\ChimeraX 1.4\bin\lib\site-
packages\chimerax\core\session.py", line 266, in discovery  
raise ValueError("error processing: %s: %s" % (_obj_stack(parents, obj), e))  
  
See log for complete Python traceback.  
  




OpenGL version: 3.3.0 NVIDIA 511.69
OpenGL renderer: NVIDIA GeForce RTX 3050 Ti Laptop GPU/PCIe/SSE2
OpenGL vendor: NVIDIA Corporation

Python: 3.9.11
Locale: en_US.cp1252
Qt version: PyQt6 6.3.0, Qt 6.3.0
Qt runtime version: 6.3.0
Qt platform: windows

Manufacturer: Dell Inc.
Model: XPS 15 9510
OS: Microsoft Windows 10 Enterprise (Build 19044)
Memory: 16,886,083,584
MaxProcessMemory: 137,438,953,344
CPU: 16 11th Gen Intel(R) Core(TM) i7-11800H @ 2.30GHz
OSLanguage: en-US

Installed Packages:
    alabaster: 0.7.12
    appdirs: 1.4.4
    Babel: 2.10.1
    backcall: 0.2.0
    blockdiag: 3.0.0
    certifi: 2022.5.18.1
    cftime: 1.6.0
    charset-normalizer: 2.0.12
    ChimeraX-AddCharge: 1.2.3
    ChimeraX-AddH: 2.1.11
    ChimeraX-AlignmentAlgorithms: 2.0
    ChimeraX-AlignmentHdrs: 3.2.1
    ChimeraX-AlignmentMatrices: 2.0
    ChimeraX-Alignments: 2.4.3
    ChimeraX-AlphaFold: 1.0
    ChimeraX-AltlocExplorer: 1.0.2
    ChimeraX-AmberInfo: 1.0
    ChimeraX-Arrays: 1.0
    ChimeraX-Atomic: 1.39.1
    ChimeraX-AtomicLibrary: 7.0
    ChimeraX-AtomSearch: 2.0.1
    ChimeraX-AxesPlanes: 2.1
    ChimeraX-BasicActions: 1.1
    ChimeraX-BILD: 1.0
    ChimeraX-BlastProtein: 2.1.1
    ChimeraX-BondRot: 2.0
    ChimeraX-BugReporter: 1.0
    ChimeraX-BuildStructure: 2.7
    ChimeraX-Bumps: 1.0
    ChimeraX-BundleBuilder: 1.1
    ChimeraX-ButtonPanel: 1.0
    ChimeraX-CageBuilder: 1.0
    ChimeraX-CellPack: 1.0
    ChimeraX-Centroids: 1.2
    ChimeraX-ChemGroup: 2.0
    ChimeraX-Clashes: 2.2.4
    ChimeraX-ColorActions: 1.0
    ChimeraX-ColorGlobe: 1.0
    ChimeraX-ColorKey: 1.5.1
    ChimeraX-CommandLine: 1.2.3
    ChimeraX-ConnectStructure: 2.0.1
    ChimeraX-Contacts: 1.0
    ChimeraX-Core: 1.4
    ChimeraX-CoreFormats: 1.1
    ChimeraX-coulombic: 1.3.2
    ChimeraX-Crosslinks: 1.0
    ChimeraX-Crystal: 1.0
    ChimeraX-CrystalContacts: 1.0
    ChimeraX-DataFormats: 1.2.2
    ChimeraX-Dicom: 1.1
    ChimeraX-DistMonitor: 1.1.5
    ChimeraX-Dssp: 2.0
    ChimeraX-EMDB-SFF: 1.0
    ChimeraX-ExperimentalCommands: 1.0
    ChimeraX-FileHistory: 1.0
    ChimeraX-FunctionKey: 1.0
    ChimeraX-Geometry: 1.2
    ChimeraX-gltf: 1.0
    ChimeraX-Graphics: 1.1
    ChimeraX-Hbonds: 2.1.2
    ChimeraX-Help: 1.2
    ChimeraX-HKCage: 1.3
    ChimeraX-IHM: 1.1
    ChimeraX-ImageFormats: 1.2
    ChimeraX-IMOD: 1.0
    ChimeraX-IO: 1.0.1
    ChimeraX-ItemsInspection: 1.0
    ChimeraX-Label: 1.1.1
    ChimeraX-ListInfo: 1.1.1
    ChimeraX-Log: 1.1.5
    ChimeraX-LookingGlass: 1.1
    ChimeraX-Maestro: 1.8.1
    ChimeraX-Map: 1.1
    ChimeraX-MapData: 2.0
    ChimeraX-MapEraser: 1.0
    ChimeraX-MapFilter: 2.0
    ChimeraX-MapFit: 2.0
    ChimeraX-MapSeries: 2.1
    ChimeraX-Markers: 1.0
    ChimeraX-Mask: 1.0
    ChimeraX-MatchMaker: 2.0.6
    ChimeraX-MDcrds: 2.6
    ChimeraX-MedicalToolbar: 1.0.1
    ChimeraX-Meeting: 1.0
    ChimeraX-MLP: 1.1
    ChimeraX-mmCIF: 2.7
    ChimeraX-MMTF: 2.1
    ChimeraX-Modeller: 1.5.5
    ChimeraX-ModelPanel: 1.3.2
    ChimeraX-ModelSeries: 1.0
    ChimeraX-Mol2: 2.0
    ChimeraX-Morph: 1.0
    ChimeraX-MouseModes: 1.1
    ChimeraX-Movie: 1.0
    ChimeraX-Neuron: 1.0
    ChimeraX-Nucleotides: 2.0.2
    ChimeraX-OpenCommand: 1.9
    ChimeraX-PDB: 2.6.6
    ChimeraX-PDBBio: 1.0
    ChimeraX-PDBLibrary: 1.0.2
    ChimeraX-PDBMatrices: 1.0
    ChimeraX-PickBlobs: 1.0
    ChimeraX-Positions: 1.0
    ChimeraX-PresetMgr: 1.1
    ChimeraX-PubChem: 2.1
    ChimeraX-ReadPbonds: 1.0.1
    ChimeraX-Registration: 1.1
    ChimeraX-RemoteControl: 1.0
    ChimeraX-ResidueFit: 1.0
    ChimeraX-RestServer: 1.1
    ChimeraX-RNALayout: 1.0
    ChimeraX-RotamerLibMgr: 2.0.1
    ChimeraX-RotamerLibsDunbrack: 2.0
    ChimeraX-RotamerLibsDynameomics: 2.0
    ChimeraX-RotamerLibsRichardson: 2.0
    ChimeraX-SaveCommand: 1.5.1
    ChimeraX-SchemeMgr: 1.0
    ChimeraX-SDF: 2.0
    ChimeraX-Segger: 1.0
    ChimeraX-Segment: 1.0
    ChimeraX-SelInspector: 1.0
    ChimeraX-SeqView: 2.6
    ChimeraX-Shape: 1.0.1
    ChimeraX-Shell: 1.0
    ChimeraX-Shortcuts: 1.1
    ChimeraX-ShowAttr: 1.0
    ChimeraX-ShowSequences: 1.0
    ChimeraX-SideView: 1.0
    ChimeraX-Smiles: 2.1
    ChimeraX-SmoothLines: 1.0
    ChimeraX-SpaceNavigator: 1.0
    ChimeraX-StdCommands: 1.8
    ChimeraX-STL: 1.0
    ChimeraX-Storm: 1.0
    ChimeraX-StructMeasure: 1.0.1
    ChimeraX-Struts: 1.0.1
    ChimeraX-Surface: 1.0
    ChimeraX-SwapAA: 2.0
    ChimeraX-SwapRes: 2.1.1
    ChimeraX-TapeMeasure: 1.0
    ChimeraX-Test: 1.0
    ChimeraX-Toolbar: 1.1.1
    ChimeraX-ToolshedUtils: 1.2.1
    ChimeraX-Tug: 1.0
    ChimeraX-UI: 1.18.3
    ChimeraX-uniprot: 2.2
    ChimeraX-UnitCell: 1.0
    ChimeraX-ViewDockX: 1.1.2
    ChimeraX-VIPERdb: 1.0
    ChimeraX-Vive: 1.1
    ChimeraX-VolumeMenu: 1.0
    ChimeraX-VTK: 1.0
    ChimeraX-WavefrontOBJ: 1.0
    ChimeraX-WebCam: 1.0
    ChimeraX-WebServices: 1.1.0
    ChimeraX-Zone: 1.0
    colorama: 0.4.4
    comtypes: 1.1.10
    cxservices: 1.2
    cycler: 0.11.0
    Cython: 0.29.26
    debugpy: 1.6.0
    decorator: 5.1.1
    docutils: 0.17.1
    entrypoints: 0.4
    filelock: 3.4.2
    fonttools: 4.33.3
    funcparserlib: 1.0.0
    grako: 3.16.5
    h5py: 3.7.0
    html2text: 2020.1.16
    idna: 3.3
    ihm: 0.27
    imagecodecs: 2021.11.20
    imagesize: 1.3.0
    ipykernel: 6.6.1
    ipython: 7.31.1
    ipython-genutils: 0.2.0
    jedi: 0.18.1
    Jinja2: 3.0.3
    jupyter-client: 7.1.0
    jupyter-core: 4.10.0
    kiwisolver: 1.4.2
    line-profiler: 3.4.0
    lxml: 4.7.1
    lz4: 3.1.10
    MarkupSafe: 2.1.1
    matplotlib: 3.5.1
    matplotlib-inline: 0.1.3
    msgpack: 1.0.3
    nest-asyncio: 1.5.5
    netCDF4: 1.5.8
    networkx: 2.6.3
    numexpr: 2.8.1
    numpy: 1.22.1
    openvr: 1.16.802
    packaging: 21.3
    ParmEd: 3.4.3
    parso: 0.8.3
    pickleshare: 0.7.5
    Pillow: 9.0.1
    pip: 21.3.1
    pkginfo: 1.8.2
    prompt-toolkit: 3.0.29
    psutil: 5.9.0
    pycollada: 0.7.2
    pydicom: 2.2.2
    Pygments: 2.11.2
    PyOpenGL: 3.1.5
    PyOpenGL-accelerate: 3.1.5
    pyparsing: 3.0.9
    PyQt6-commercial: 6.3.0
    PyQt6-Qt6: 6.3.0
    PyQt6-sip: 13.3.1
    PyQt6-WebEngine-commercial: 6.3.0
    PyQt6-WebEngine-Qt6: 6.3.0
    python-dateutil: 2.8.2
    pytz: 2022.1
    pywin32: 303
    pyzmq: 23.1.0
    qtconsole: 5.3.0
    QtPy: 2.1.0
    RandomWords: 0.3.0
    requests: 2.27.1
    scipy: 1.7.3
    setuptools: 59.8.0
    sfftk-rw: 0.7.2
    six: 1.16.0
    snowballstemmer: 2.2.0
    sortedcontainers: 2.4.0
    Sphinx: 4.3.2
    sphinx-autodoc-typehints: 1.15.2
    sphinxcontrib-applehelp: 1.0.2
    sphinxcontrib-blockdiag: 3.0.0
    sphinxcontrib-devhelp: 1.0.2
    sphinxcontrib-htmlhelp: 2.0.0
    sphinxcontrib-jsmath: 1.0.1
    sphinxcontrib-qthelp: 1.0.3
    sphinxcontrib-serializinghtml: 1.1.5
    suds-community: 1.0.0
    tables: 3.7.0
    tifffile: 2021.11.2
    tinyarray: 1.2.4
    tornado: 6.1
    traitlets: 5.1.1
    urllib3: 1.26.9
    wcwidth: 0.2.5
    webcolors: 1.11.1
    wheel: 0.37.1
    wheel-filename: 1.3.0
    WMI: 1.5.1

[Eric Pettersen]

Plus follow-on errors

[Tom Goddard]

User used "volume splitbyzone #3" which made 8 copies of a 512x512x512 float32 map (0.5 Gbytes each), the session save failed running out of memory.

Probably should catch this and add a message saying ran out of memory trying to save all the unsaved maps, and list those maps and their memory use.

[Tom Goddard]

Fixed.

Add clear error message when out of memory saving session including maps.