Probably you have to rename MW to HW3 in your pdb-file...it's a known issue, I guess.

Best regards

Maik Goette, Dipl. Biol.
Max Planck Institute for Biophysical Chemistry
Theoretical & computational biophysics department
Am Fassberg 11
37077 Goettingen
Germany
Tel.  : ++49 551 201 2310
Fax   : ++49 551 201 2302
Email : mgoette[at]mpi-bpc.mpg.de
        mgoette2[at]gwdg.de
WWW   : http://www.mpibpc.gwdg.de/groups/grubmueller/


Christian Seifert wrote:
Hi.

I want to use the ff oplsaa with tip4p water (as suggested in the manual).

Using:
genbox_d -cp hpo4_box.pdb -o hpo4_water.pdb -cs tip4p.gro

creates a good pdf-file with tip4p-water, but the following:
pdb2gmx_d -f hpo4_water.pdb -o hpo4_water.gro -p hpo4_water.top -ff oplsaa -n hpo4_water.ndx -water tip4p

brings up this error:

-------------------------------------------------------
Program pdb2gmx_d, VERSION 3.3.1
Source code file: pdb2gmx.c, line: 393

Fatal error:
Atom MW in residue HO4 1 not found in rtp entry with 4 atoms
             while sorting atoms
-------------------------------------------------------

Is there any workaround?

Thanks in advance

Christian Seifert.
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