[gmx-users] Atomtype OW_tip4p not found

Amir Abbasi amir.abbasi69 at yahoo.com
Wed Jun 6 13:19:05 CEST 2012

I use tleap to generate topology file of a RNA molecule with parmbsc0 ff. Then I generate .gro and .top files of that with amb2gmx.pl.
I'm manually add this lines to .top file 

; Include water topology
#include "amber99sb.ff/tip4p.itp"

; Include topology for ions
#include "amber99sb.ff/ions.itp"
 but after running this code:

grompp -f ions.mdp -c ribozyme_solv.gro -p ribozyme.top -o ions.tpr

 I've got this error message:

Program grompp, VERSION 4.5.5
Source code file: /build/buildd/gromacs-4.5.5/src/kernel/toppush.c, line: 1166

Fatal error:
Atomtype OW_tip4p not found

what should I do?

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