<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:12pt"><div>Dear gmx users,</div><div>I've installed the gromacs version 4.5.5 on my laptop. But the version of gromacs on the cluster, which I want to run MD, is 4.0. First of all. is it possible that I use this one?</div><div>Secondly, when I run this command, I get a fatal error as below:</div><div><br></div><div># grompp -f md.mdp -c npt.gro -t npt.cpt -p popc.top -o md.tpr</div><div> Fatal error:</div><div>Invalid dihedral type 9 <br></div><div>Is it because of the differences between versions?</div><div><br></div><div>Thanks in advance,</div><div>Shima<br></div></div></body></html>