[gmx-users] Fatal error: Could only find a forcefield type for 106 out of 270 atoms

[darrellk at ece.ubc.ca]

Could you please let me know why GROMACS is able to find forcefields for
only 106 of the 270 atoms. My .gro file is a model of a graphene
structure with 211 equally spaced carbon atoms with the remaining
hydrogen atoms also equally spaced from the carbon atoms to which they
are bonded. Here is a sample output:

********************************************************************
Can not find forcefield for atom C-208 with 3 bonds
Can not find forcefield for atom C-209 with 3 bonds
Can not find forcefield for atom C-210 with 3 bonds
Can not find forcefield for atom C-211 with 3 bonds

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Program x2top, VERSION 3.3.3
Source code file: x2top.c, line: 206

Fatal error:
Could only find a forcefield type for 106 out of 270 atoms
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********************************************************************

Thank you in advance for your assistance.

Darrell Koskinen
MASc Candidate
University of British Columbia