I am a novice at Gromacs (although I used Gromos 20+ years ago!)....I have a dimer with two zincs per monomer, and I get the following complaint when running the grompp with pr.dmp, which I assume is referring to the 4 zincs.


There are:  6789      OTHER residues
There are:   262    PROTEIN residues
There are:     0        DNA residues
Analysing Protein...
Analysing Other...

-------------------------------------------------------
Program grompp, VERSION 3.3.2
Source code file: readir.c, line: 865

Fatal error:
4 atoms are not part of any of the T-Coupling groups
-------------------------------------------------------

the zincs are in the pdb file as (properly formatted in the pdb file!):

ATOM 2103 SG CYS B 133 -10.574 -5.438 18.502 1.00 51.42 S ATOM 2104 C CYS B 133 -10.084 -9.287 20.134 1.00 50.50 C ATOM 2105 O CYS B 133 -9.171 -9.545 20.923 1.00 50.69 O HETATM 2106 ZN ZN2+C 1 -12.350 1.941 1.066 1.00 43.80 ZN HETATM 2107 ZN ZN2+C 2 -21.690 2.493 -3.958 1.00 38.99 ZN HETATM 2109 ZN ZN2+C 3 -11.783 11.509 10.159 1.00 28.52 ZN HETATM 2108 ZN ZN2+C 4 -17.911 8.618 18.155 1.00 32.42 ZN

What am I doing wrong ?

Many thanks
Garry

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