HI <br> i have generated a topology file for drug using prodrg with gromos 96.1force field , now i want to use it for simulation with DNA in complex. I am using amber 03 force field for my system . i have included correctly the drg.itp file in generated topology file for DNA alone (using pdb2gmx).<br>
i managed to run upto genbox successfully ,but when i tried to run grompp it showed error<br>"Atom type 'CH1' not found !"<br>where i have to modify the things to work it properly .<br><br><br>