On 07/07/2013 03:18 AM, Justin Lemkul wrote:
This problem can be solved by remembering to complete step 5 of http://www.gromacs.org/Documentation/How-tos/Adding_a_Residue_to_a_Force_Field.

As Mark notes, though, this issue is entirely separate from your initial problem.

-Justin

Hello Justin:

thanks a lot for kind advices. This problem solved now. However, the grompp still have some problems:

 grompp_mpi -f em.mdp -c gmx.pdb -o em.tpr

source code gromacs-4.6.2/src/kernel/toppush.c, line: 726
Fatal error:
Unknown bond_atomtype NCH1

It is pretty strange, I already add NCH1 atom type in ffbonded.itp as following:

[ bondtypes ]
; i    j    func    b0    kb
NCH1    CT2    1    0.149    284512.0
NCH1    HCR    1    0.1    359824.0
NCH1    CR15    1    0.132    410032.0

In the atomtypes.atp, I also have information:

NCH1    14.00700 ;    LYR


Why it still complained?

thank you very much

Albert


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