Error in GB implicit solvent .tpr file generation

User discussions
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1

GROMACS version:2018.8
GROMACS modification: No

Hi there,
I got an error message when running grompp for gb implicit solvent model :
Fatal error:
Can’t do GB electrostatics; the implicit_genborn_params section of the
forcefield is missing parameters for 31 atomtypes or they might be negative.
i have used Charmm36m FF for topology files generation . I also tried older Charmm36 FF hoping to resolve the error but i got the same error again. The molecules are Glycoproteins. It will be very helpful if some one can guide me to a solution.

2

CHARMM36 does not support GB models in GROMACS. I thought that code was removed years ago, anyway.

3

thanks. the functionality is deprecated in 2019 version. which FF may i use to implement GB implicit solvent topology generation?