[gmx-users] unknown cmap torsion between atoms

[ram bio]

Dear Gromacs users,

I have built a protein embedded in popc bilayer and executed pdb2gmx using
charmm27 ff on the system and the toplogy file was created without errors,
but when wanted to minimise the system with grompp i am getting an error as
: unknown cmap torsion between atoms 8377 8379 8381 8394 8397.

Could someone please explain me what this error mean and how to overcome
this.

thanks,

Pramod
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