Gmx pdb2gmx not working

[sam]

Thanks for replyig , i will search but execuse me if you please can you help in this

Nonbonded interactions on the GPU

Hello, the error message indicates that Gromacs was not built with GPU support. Did you compile it yourself and specify -DGMX_GPU=on when running cmake (as per the installation guide), or get it from the Ubuntu repositories? If the latter, try compiling it yourself. Regards, Petter

the command is running well without gpu and i want to enforce gpu but facing problem