ribbon 3j3f gives error

[Elaine Meng]

Opening rna structure 3j3f gives an error apparently related to ribbon representation. This is part of a ribosome and the entry is obsolete since now the whole structure is entry 4v6x. However, if you use command "ribbon nucleic" on 4v6x the same error is obtained. Seems like it's due to some missing atoms. I tried some other DNA and RNA structures and they didn't have this problem.

Error processing trigger "graphics update"
Traceback (most recent call last):
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/triggerset.py", line 114, in invoke
return self._func(self._name, data)
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/atomic/structure.py", line 233, in _update_graphics_if_needed
self._create_ribbon_graphics()
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/atomic/structure.py", line 370, in _create_ribbon_graphics
ribbon = Ribbon(coords, guides)
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/atomic/ribbon.py", line 12, in init
raise ValueError("different number of coordinates and guides")
ValueError: different number of coordinates and guides

[Elaine Meng]

apparently fixed, neither 3j3f or "ribbon nucleic" on 4v6x generate the error and nucleic ribbons are shown

[Elaine Meng]

was probably the same issue as #229