[gmx-users] Fatal error: 126 atoms are not part of any of the T-Coupling groups

[Mark Abraham]

Joern Lenz wrote:
> dear users,
> i am simulating a complex of DNA and protein.
> also i looked through the mailing list I did not find any solution to my 
> problem.

If you searched for advice about T-coupling groups you will have seen 
the strongly-worded advice not to use more than two or three, and 
definitely not multiple small geometrically-isolated groups.

Probably you should use make_ndx on the correct structure file and make 
(say) a solvent+ions group and a solutes group and T-couple those.

Mark