Error: dihedral_potential type improperly specified in mcf file

Dear Cassandra developers,

I am facing a problem when trying to run a test simulation of a NPT system containing one component. I inserted a new dihedral potential in the files input_routines.f90 and energy_routines.f90 called "sum ". Also, the molecule I am studying considers two different dihedral potentials: OPLS and sum. I could generate the mcf file and the fragments of the molecule; however, when I try to run the inp file, the following error appears: dihedral_potential type improperly specified in mcf file.

I have done some modifications in the mcf file but the error persists.

I would appreciate any help on this subject.

Many thanks in advance.

Perci Homrich.
Postdoctoral researcher at the University of São Paulo.