gromos43a1.ff/methanol.itp has incompatible atom type "CMET" and "OMET"
Created an attachment (id=557)
Patch to methanol.itp
From GROMACS version 4.5, gromos43a1 force field uses "CMet" atomtype instead of "CMET" used in version 4.0.
However atomtypes in methanol.itp was not renamed, hence causing a problem.
The fix is trivial as I attached a patch.