Open sms file: query_chain is None

[Elaine Meng]

The following bug report has been submitted:
Platform:        macOS-15.4.1-arm64-arm-64bit
ChimeraX Version: 1.11.dev202505130148 (2025-05-13 01:48:41 UTC)
Description
Error opening old sms file (from Foldseek tool back in January), so maybe this is not important.  I was able to open different sms files from the same day, just not this one, which is attached.

Log:
> open /Users/meng/Desktop/startup.cxc

> alias reset view orient; view initial

> alias start tool show $1

> alias whereprefs info path user unversioned config

> alias captut open help:user/tutorials/binding-sites.html#cap-example

> alias previewts toolshed url https://cxtoolshed-
> preview.rbvi.ucsf.edu;toolshed reload available

> alias normalts toolshed url https://cxtoolshed.rbvi.ucsf.edu;toolshed reload
> available

> alias btut open
> https://www.cgl.ucsf.edu/home/meng/chimerax/vdocs/user/tutorials/binding-
> sites.html; ui dockable false "Help Viewer"

> alias stut open https://www.rbvi.ucsf.edu/chimerax/data/conservation-
> coloring/conservation-coloring.html; ui dockable false "Help Viewer"

> alias ltut open https://www.rbvi.ucsf.edu/chimerax/data/loop-modeling/loop-
> modeling.html; ui dockable false "Help Viewer"

> alias mtut open https://www.rbvi.ucsf.edu/chimerax/data/mole-channel/mole-
> channel.html; ui dockable false "Help Viewer"; windowsize 600 800

executed startup.cxc  
UCSF ChimeraX version: 1.11.dev202505130148 (2025-05-13)  
© 2016-2025 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  

> open /Users/meng/Desktop/startup.cxc format cmd

> alias reset view orient; view initial

> alias start tool show $1

> alias whereprefs info path user unversioned config

> alias captut open help:user/tutorials/binding-sites.html#cap-example

> alias previewts toolshed url https://cxtoolshed-
> preview.rbvi.ucsf.edu;toolshed reload available

> alias normalts toolshed url https://cxtoolshed.rbvi.ucsf.edu;toolshed reload
> available

> alias btut open
> https://www.cgl.ucsf.edu/home/meng/chimerax/vdocs/user/tutorials/binding-
> sites.html; ui dockable false "Help Viewer"

> alias stut open https://www.rbvi.ucsf.edu/chimerax/data/conservation-
> coloring/conservation-coloring.html; ui dockable false "Help Viewer"

> alias ltut open https://www.rbvi.ucsf.edu/chimerax/data/loop-modeling/loop-
> modeling.html; ui dockable false "Help Viewer"

> alias mtut open https://www.rbvi.ucsf.edu/chimerax/data/mole-channel/mole-
> channel.html; ui dockable false "Help Viewer"; windowsize 600 800

executed startup.cxc  

> cd /Users/meng/Downloads/chimerax/foldseek

Current working directory is: /Users/meng/downloads/ChimeraX/Foldseek  

> open 2gbp*1.sms

Summary of feedback from opening 2gbp_foldseek_pdb_1.sms  
---  
notes | > open /Users/meng/Downloads/ChimeraX/PDB/2gbp.cif2gbp.cif title:  
Sugar and signal-transducer binding sites of the escherichia coli galactose
chemoreceptor protein [more info...]  
  
  
  
  
| Chain information for 2gbp.cif #1  
  
---  
  
  
Chain  
| Description  
| UniProt  
  
  
  
  
  
A  
| D-GALACTOSE/D-GLUCOSE BINDING PROTEIN  
| DGAL_ECOLI 1-309  
  
  
  
  
  
  
  
Non-standard residues in 2gbp.cif #1  
  
---  
  
  
  
  
BGC — β-D-glucose  
  
  
  
CA — calcium ion  
  
  
  
  
Found 727 similar structures to 2gbp.cif #1/A in pdb database using foldseek,
name fs1  
  
Read 727 similar structures to 2gbp.cif #1/A in pdb database using foldseek,
name fs1  

> close session

> open junk*sms

Traceback (most recent call last):  
File
"/Users/meng/Desktop/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/cmd_line/tool.py", line 319, in execute  
cmd.run(cmd_text)  
File
"/Users/meng/Desktop/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/core/commands/cli.py", line 3219, in run  
result = ci.function(session, **kw_args)  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File
"/Users/meng/Desktop/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/open_command/cmd.py", line 132, in cmd_open  
models = Command(session, registry=registry).run(provider_cmd_text,
log=log)[0]  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File
"/Users/meng/Desktop/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/core/commands/cli.py", line 3219, in run  
result = ci.function(session, **kw_args)  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File
"/Users/meng/Desktop/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/open_command/cmd.py", line 215, in provider_open  
models, status = collated_open(session, None, [data], data_format,
_add_models,  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File
"/Users/meng/Desktop/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/open_command/cmd.py", line 526, in collated_open  
return remember_data_format()  
^^^^^^^^^^^^^^^^^^^^^^  
File
"/Users/meng/Desktop/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/open_command/cmd.py", line 497, in remember_data_format  
models, status = func(*func_args, **func_kw)  
^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File
"/Users/meng/Desktop/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/similarstructures/__init__.py", line 80, in open  
results = SimilarStructures.read_sms_file(session, path)  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File
"/Users/meng/Desktop/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/similarstructures/simstruct.py", line 437, in read_sms_file  
r = SimilarStructures(data['hits'], query_chain,  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File
"/Users/meng/Desktop/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/similarstructures/simstruct.py", line 46, in __init__  
r2i = {r:i for i,r in enumerate(query_chain.residues) if r is not None}  
^^^^^^^^^^^^^^^^^^^^  
AttributeError: 'NoneType' object has no attribute 'residues'  
  
AttributeError: 'NoneType' object has no attribute 'residues'  
  
File
"/Users/meng/Desktop/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/similarstructures/simstruct.py", line 46, in __init__  
r2i = {r:i for i,r in enumerate(query_chain.residues) if r is not None}  
^^^^^^^^^^^^^^^^^^^^  
  
See log for complete Python traceback.  
  




OpenGL version: 4.1 Metal - 89.4
OpenGL renderer: Apple M1 Pro
OpenGL vendor: Apple

Python: 3.11.4
Locale: en_US.UTF-8
Qt version: PyQt6 6.8.1, Qt 6.8.2
Qt runtime version: 6.8.2
Qt platform: cocoa
Hardware:

    Hardware Overview:

      Model Name: MacBook Pro
      Model Identifier: MacBookPro18,1
      Model Number: MK1F3LL/A
      Chip: Apple M1 Pro
      Total Number of Cores: 10 (8 performance and 2 efficiency)
      Memory: 16 GB
      System Firmware Version: 11881.101.1
      OS Loader Version: 11881.101.1

Software:

    System Software Overview:

      System Version: macOS 15.4.1 (24E263)
      Kernel Version: Darwin 24.4.0
      Time since boot: 3 hours, 51 minutes

Graphics/Displays:

    Apple M1 Pro:

      Chipset Model: Apple M1 Pro
      Type: GPU
      Bus: Built-In
      Total Number of Cores: 16
      Vendor: Apple (0x106b)
      Metal Support: Metal 3
      Displays:
        Color LCD:
          Display Type: Built-in Liquid Retina XDR Display
          Resolution: 3456 x 2234 Retina
          Main Display: Yes
          Mirror: Off
          Online: Yes
          Automatically Adjust Brightness: Yes
          Connection Type: Internal


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    appdirs: 1.4.4
    appnope: 0.1.4
    asttokens: 3.0.0
    auditwheel: 6.3.0
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    beautifulsoup4: 4.13.3
    blockdiag: 3.0.0
    blosc2: 3.3.2
    build: 1.2.2.post1
    certifi: 2023.11.17
    cftime: 1.6.4.post1
    charset-normalizer: 3.4.2
    ChimeraX-AddCharge: 1.5.18
    ChimeraX-AddH: 2.2.7
    ChimeraX-AlignmentAlgorithms: 2.0.2
    ChimeraX-AlignmentHdrs: 3.6.1
    ChimeraX-AlignmentMatrices: 2.1
    ChimeraX-Alignments: 2.20.1
    ChimeraX-AlphaFold: 1.0.1
    ChimeraX-AltlocExplorer: 1.1.2
    ChimeraX-AmberInfo: 1.0
    ChimeraX-Aniso: 1.1.3
    ChimeraX-Arrays: 1.1
    ChimeraX-Atomic: 1.60.6
    ChimeraX-AtomicLibrary: 14.1.18
    ChimeraX-AtomSearch: 2.0.1
    ChimeraX-AxesPlanes: 2.4
    ChimeraX-BasicActions: 1.1.3
    ChimeraX-BILD: 1.0
    ChimeraX-BlastProtein: 3.0.0
    ChimeraX-Boltz: 1.0
    ChimeraX-BondRot: 2.0.4
    ChimeraX-BugReporter: 1.0.2
    ChimeraX-BuildStructure: 2.13.1
    ChimeraX-Bumps: 1.0
    ChimeraX-BundleBuilder: 1.5.1
    ChimeraX-ButtonPanel: 1.0.1
    ChimeraX-CageBuilder: 1.0.1
    ChimeraX-CellPack: 1.0
    ChimeraX-Centroids: 1.4
    ChimeraX-ChangeChains: 1.1
    ChimeraX-CheckWaters: 1.5
    ChimeraX-ChemGroup: 2.0.2
    ChimeraX-Clashes: 2.3
    ChimeraX-ColorActions: 1.0.5
    ChimeraX-ColorGlobe: 1.0
    ChimeraX-ColorKey: 1.5.8
    ChimeraX-CommandLine: 1.2.6
    ChimeraX-ConnectStructure: 2.0.1
    ChimeraX-Contacts: 1.0.1
    ChimeraX-Core: 1.11.dev202505130148
    ChimeraX-CoreFormats: 1.2
    ChimeraX-coulombic: 1.4.5
    ChimeraX-Crosslinks: 1.0
    ChimeraX-Crystal: 1.0
    ChimeraX-CrystalContacts: 1.0.1
    ChimeraX-DataFormats: 1.2.4
    ChimeraX-Dicom: 1.2.7
    ChimeraX-DistMonitor: 1.4.2
    ChimeraX-DockPrep: 1.1.4
    ChimeraX-Dssp: 2.0
    ChimeraX-EMDB-SFF: 1.0
    ChimeraX-ESMFold: 1.0
    ChimeraX-FileHistory: 1.0.1
    ChimeraX-FunctionKey: 1.0.1
    ChimeraX-Geometry: 1.3
    ChimeraX-gltf: 1.0
    ChimeraX-Graphics: 1.4.1
    ChimeraX-Hbonds: 2.5.1
    ChimeraX-Help: 1.3
    ChimeraX-HKCage: 1.3
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    ChimeraX-IMOD: 1.0
    ChimeraX-IO: 1.0.3
    ChimeraX-ItemsInspection: 1.0.1
    ChimeraX-IUPAC: 1.0
    ChimeraX-KVFinder: 1.7
    ChimeraX-Label: 1.1.14
    ChimeraX-ListInfo: 1.2.2
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    ChimeraX-LookingGlass: 1.1
    ChimeraX-Maestro: 1.9.1
    ChimeraX-Map: 1.3
    ChimeraX-MapData: 2.0
    ChimeraX-MapEraser: 1.0.1
    ChimeraX-MapFilter: 2.0.1
    ChimeraX-MapFit: 2.0
    ChimeraX-MapSeries: 2.1.1
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    ChimeraX-Mask: 1.0.2
    ChimeraX-MatchMaker: 2.2.1
    ChimeraX-MCopy: 1.0
    ChimeraX-MDcrds: 2.10.1
    ChimeraX-MedicalToolbar: 1.1
    ChimeraX-Meeting: 1.0.1
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    ChimeraX-mmCIF: 2.16
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    ChimeraX-Mol2: 2.0.3
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    ChimeraX-Nifti: 1.2
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    ChimeraX-NRRD: 1.2
    ChimeraX-Nucleotides: 2.0.3
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    ChimeraX-PDB: 2.7.10
    ChimeraX-PDBBio: 1.0.1
    ChimeraX-PDBLibrary: 1.0.4
    ChimeraX-PDBMatrices: 1.0
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    ChimeraX-PubChem: 2.2
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    ChimeraX-RotamerLibsRichardson: 2.0
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    ChimeraX-Test: 1.0
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    ChimeraX-UI: 1.45.1
    ChimeraX-Umap: 1.0
    ChimeraX-uniprot: 2.3.1
    ChimeraX-UnitCell: 1.0.1
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    ChimeraX-VIPERdb: 1.0
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    ChimeraX-vrml: 1.0
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    ChimeraX-WavefrontOBJ: 1.0
    ChimeraX-WebCam: 1.0.2
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File attachment: junk_foldseek_pdb.sms

junk_foldseek_pdb.sms​

[Elaine Meng]

Added by email2trac

[Tom Goddard]

Fixed in 1.10.

This similar structure results (.sms) file refers to file junk.pdb containing the chain used to do the search. Since that file is not available the similar structures tool has no query chain. The code wasn't very robust when there is no query chain. Most of the capabilities (traces, clusters, ligands) are disabled when there is no query structure. But I made it open the table by protecting a few places in the code that were assuming the query structure is available.