double occupancies cause disvis to fail with misleading error

[schaarj]

Specifying residues with multiple occupancies e.g.

ATOM      5  CA AARG A   1  ...
ATOM      6  CA BARG A   1  ...

in the interaction analysis causes Disvis to fail with following error:

ValueError: Some selected residues where not found in the PDB file. Please check your input residues.

This should probably either not fail at all or fail with a more specific error message.

[latrocinia]

Supporting alternate atoms (as well as insertion codes) is too much work to support in this version of disvis. I'd rather update the error message.

[amjjbonvin]

Makes sense.
the above example was about double occupancies and the user should make a choice.