Hello, I have installed the Groamcs 4.0.5 version on linux machime. During the simulation I found that prog. take the /usr/share/gromacs/top (here gromacs 3.3 version) instead of /usr/local/gromacs/share/gromacs/top (here is Groamcs 4.0.5 version. Can you tell How to modify path sothat I can use groamcs 4.0.5 version. Thanks Nilesh