[gmx-users] question

[nafas]

Hi
I am tring with mixture pope/popg for simulatie membrane bacteria that i use of gromos53a6 force field.
what force field should i use?charmm force field?

in program  have been used pope.itp ,popg.itp, .....files .
I want to run grompp command but give afatall error:not found NH3L atomtype.
grompp -f minim.mdp -c ......gro -p ....top -o em.tpr

I dont know what is problem?
May you guide me?
thanks