[modeller_usage] ERROR: CHARMM residue type 'A' unrecognized (in mutate_model.py execution)

Dear All,

When I try to make a mutate models by using mutate_model.py , I am getting error like below:

Traceback (most recent call last): File "mutate_model.py", line 95, in <module> s.mutate(residue_type=restyp) File "/usr/local/opt/apps/pkg/modeller/9.16/modlib/modeller/selection.py", line 492, in mutate inds, residue_type) _modeller.ModellerError: mutate_mod_E> CHARMM residue type 'v' unrecognized

and this " type 'v' " arise for all the residues.

Thanking you in advance

With Regards Mahesh V