[gmx-users] ffgmx_lipids and OWT4

andrea spitaleri spitaleri.andrea at hsr.it
Wed Sep 28 11:28:58 CEST 2005

Hi there,
I downloaded the ffgmx_lipids from 
and followd the indications how to use it.
When I run pdb2gmx I get this error:
pdb2gmx -f C.pdb -o C.gro
Opening library file /usr/local/share/gromacs/top/ffgmx.rtp
Residue 50Fatal error: Atom type OWT4 (residue HO4) not found in 
atomtype database

and in fact in ffgmx.atp is missing the OWT4 atom type which, instead, 
it is presents in the old ffgmx.atp (coming with gromacs 3.2.1)
If I keep the old ffgmx.atp, pdb2gmx runs fine but I am wondering if it 
is a right procedure.
I could not fin anything about it on the gromacs web page.


Andrea Spitaleri
Dulbecco Telethon Institute
c/o DIBIT Scientific Institute
Biomolecular NMR, 1B4
Via Olgettina 58
20132 Milano (Italy)
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