[Chimera-users] Error: UnboundLocalError: local variable 'i' referenced before assignment

[Letizia Meregalli]

Hi,
I have a tRNA molecule and I would like to measure the angles between two nitrogenous bases. I created two planes, each for each base. When I select both planes, in order to measure the angles between them (Structure Measurements Axes/Planes/Centroids) I get following message:


<type 'exceptions.UnboundLocalError'> Exception in Tk callback
  Function: <bound method SortableTable._browseCmd of <CGLtk.Table.SortableTable instance at 0x117990638>> (type: <type 'instancemethod'>)
  Args: ('1',)
Traceback (innermost last):
  File "/Applications/Chimera.app/Contents/Resources/lib/python2.7/site-packages/Pmw/Pmw_1_3/lib/PmwBase.py", line 1747, in __call__
    return apply(self.func, args)
  File "/Applications/Chimera.app/Contents/Resources/share/CGLtk/Table.py", line 1043, in _browseCmd
    self.userBrowseCmd(self.selected())
  File "/Applications/Chimera.app/Contents/Resources/share/StructMeasure/Geometry.py", line 268, in _tableCB
    self.feedback(sels)
  File "/Applications/Chimera.app/Contents/Resources/share/StructMeasure/Geometry.py", line 113, in feedback
    diff = " ".join(words2[i:])
<type 'exceptions.UnboundLocalError'>: local variable 'i' referenced before assignment

UnboundLocalError: local variable 'i' referenced before assignment

  File "/Applications/Chimera.app/Contents/Resources/share/StructMeasure/Geometry.py", line 113, in feedback
    diff = " ".join(words2[i:])

See reply log for Python traceback.



I really don’t know how can I solve this problem.. I’d be really grateful if you could help me or give me some hints!
thank you a lot

Letizia
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