I am opening up a pdb that has been generated after MD simulations. Waters have been removed. I am getting an unusual error. I have two pdb files that were generated similarly, but only one gives me the error. Traceback (most recent call last): File "/Applications/Chimera.app/Contents/Resources/share/chimera/tkgui.py", line 343, in openPath mols = chimera.openModels.open(path, type=ftype) File "/Applications/Chimera.app/Contents/Resources/share/chimera/__init__.py", line 1541, in open models = func(filename, *args, **kw) File "/Applications/Chimera.app/Contents/Resources/share/chimera/__init__.py", line 770, in _openPDBModel errOut=errLog) error: radius must be positive Error reading bfactor-911_changed.pdb: error: radius must be positive File "/Applications/Chimera.app/Contents/Resources/share/chimera/__init__.py", line 770, in _openPDBModel errOut=errLog) If someone can help, I would appreciate it.