Dear Gromacs users,<br> <br> I am planing to use wildcard atomtypes in [ dihedrals ] directive of the ffbonded.itp file, As my system contain O-C dihedral, all the O-C dihedrals are same, so instead of mentioning each dihedral explicitly i have tried wildcard atom types by specifing X-O-C-X but couldn't succeed, It is giving the error: No default Proper Dih. types.<br>
Is there any specific method to use wildcard atom types in Gromacs for dihedrals or do I have to define the wildcard atomtypes, if so in which file do i have to define it. <br><br>Any help will be highly appreciated.<br><br>
<br>Thank you in advance.<br> <br><br><br>Regards,<br>Ramesh Cheerla.<br>