I'm sorry, I realize I didn't mention in my first reply that you should download the new version of ffgmx modified for describing lipids to be used with the popc.itp topology file, you can find it at this link:
http://www.gromacs.org/topologies/force_fields.php
"Invalid order for directive atomtypes" means that you have called the various .itp files before calling the ffgmx.itp file, this way gromacs doesn't know which force field refer to when reading your topologies. The ffgmx must be the first call.
Hope it helps.
cheers,
MG
On 5/3/06,
mahbubeh zarrabi <[EMAIL PROTECTED]> wrote:
Hi,everyone,
I have tried to use popc.pdb that the coordinates
are from Tieleman's web to insert a protein.when i use
ffgmx.itp , there is fetal error:
atomtype LC3 not found.
i downloaded ffgmx_lipid but i have a problem:
fetal error: invalid order for directive atomtypes
file .....share\top\... line 1
whould you please help me?
best regards
zarrabi
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