[gmx-users] trjconv mismatch in number of atoms

Jennifer Vo quyviolet at gmail.com
Tue Jan 13 16:15:37 CET 2015

Dear Experts,
I am running a trjconv from xtc files to pdb file but have got this error:

Fatal error:
Index[4622] 135978 is larger than the number of atoms in the
trajectory file (36976). There is a mismatch in the contents
of your -f, -s and/or -n files.

I don't know where the origin of the Problem, the index.ndx was created
from md.gro file, the *.xtc (8 Proteins in a box, so I type #1 to have the
index of 8 Proteins, each Protein has 4622 Atoms). The trajectory has 36976
Atoms which is 4622 * 8  and 135978 is the total number of Atoms in the
I would really appreciate for your help.

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