[gmx-users] introducing "HISE" to gromos43a1

[Saman Shahriyari]

Hello dears 
i am trying to do some analysis on a trajectory by gromos43a1ff. but as i run pdb2gmx, an error shows up that the "HISE" residue is not known to this forcefield. how can i deal with this issue? can i be introducing the parameters of "HISE" to gromos43a1? if so, how can i get them and what the approach whould be?
regard,
Saman