Hello
After grompp -f em.mdp -p topol.top -c solvated.gro -o em.tpr I got the error: Incorrect number of parameters - found 2, expected 4 or 4 for U-B. I thought that this could be an inconsistency be declaring the functions, but in my topology I have function 4 (for improper dihedrals): Out of topol.top [ dihedrals ] ; ai aj ak al funct c0 c1 c2 c3 1 8 6 4 4 180 100 And in my .rtp file in the CHARMM27 force field folder I have: Out of .rtp file ; bonds angles dihedrals impropers 1 5 4 4 and in my ffbonded.itp file I have: [ dihedraltypes ] ; i j k l func q0 cq ON1 NN3A CN1A NN2U 4 180 100 So in alle three files, ffbonded.itp, topol.top and the .rtp parametrization file I have the function 4 for the improper dihedrals. What is the problem? Thanks for helping me Greetings Lara -- gmx-users mailing list gmx-users@gromacs.org http://lists.gromacs.org/mailman/listinfo/gmx-users Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/Search before posting! Please don't post (un)subscribe requests to the list. Use the www interface or send it to gmx-users-requ...@gromacs.org. Can't post? Read http://www.gromacs.org/Support/Mailing_Lists