[gmx-users] Atomtype CG311 not found

[Poncho Arvayo Zatarain]

Hello everyone: i´m trying to minimize a dppc-dppe-heta membrane, using charmm36. But when i use the grompp i have the following error:

line: 1353 Fatal error: Atomtype CG311 not found.
My topology includes:
include "toppar/charmm36.itp"
include "toppar/DPPE.itp"
include "toppar/DPPC.itp"
include "toppar/HETA.itp
include "toppar/TIP3.itp

[System]
DPPC 26
DPPE 230
HETA 72
TIP3 72

Is there any relationship with my forcefield, the topology and the error that appears?