grompp perturbs residue numbers
Created an attachment (id=400)
.gro, .top, .tpr
In both CVS-current (4.0.x release?) and git-current gromacs, if I take a .gro input file with sequentially-numbered residues, run grompp, and then try to make an index file from the result, I get a different residue numbering (atom numbers seem to be preserved). Having trouble tracking down exactly what's going on here, but I'm enclosing example files. Let me know if you want .itp, etc.
#2 Updated by Berk Hess over 10 years ago
I changed the residue numbering.
Gromacs (git master) was supposed to retain the input residue
for molecules with more than 1 residue and continue counting
after the last larger molecule for single residue molecules.
But there might have been a bug in the counting somewhere.
Now the maximum residue number of all molecules is determined first
and counting is continued from there for single residue molecules
(or even multiple-residue molecules with GMX_MAXRESRENUM).