cchange exception when files do not exist
(<class 'Voyager.Actions.cell_content_analysis.cell_content_analysis_exception'>, cell_content_analysis_exception('FATAL ERROR. The file data/KMV36C.pir is not either a sequence or a coordinate file.',), <traceback object at 0x14f487050>) Traceback (most recent call last): File "/Users/claudia/voyagerdev/phaser_voyager/src/Voyager/Actions/define_crystal.py", line 107, in run output = self.define_crystal_content(self.argsparse) File "/Users/claudia/voyagerdev/phaser_voyager/src/Voyager/Actions/define_crystal.py", line 145, in define_crystal_content dict_assembly = cellcontent.get_dict_assembly(argsparse, force_computation=False) File "/Users/claudia/voyagerdev/phaser_voyager/src/Voyager/Actions/cell_content_analysis.py", line 238, in get_dict_assembly dizseq = self.validate_sequence_or_pdb(molecule.sequence_file) File "/Users/claudia/voyagerdev/phaser_voyager/src/Voyager/Actions/cell_content_analysis.py", line 551, in validate_sequence_or_pdb raise cell_content_analysis_exception("FATAL ERROR. The file " + sequenceorpdb + " is not either a sequence or a coordinate file.") cell_content_analysis_exception: FATAL ERROR. The file data/KMV36C.pir is not either a sequence or a coordinate file. An exception of type cell_content_analysis_exception occurred. Message: