_modeller.SequenceMismatchError: get_ran_648E> Alignment sequence not
found in PDB file: 1 ./input.pdb (You didn't specify the
starting and ending residue numbers and chain IDs in the alignment, so
Modeller tried to guess these from the PDB file.) Suggestion: put in the
residue numbers and chain IDs (see the manual) and run again for more
detailed diagnostics. You could also try running with
allow_alternates=True to accept alternate one-letter code matches (e.g.
B to N, Z to Q).
How I could fix it ?