I was giving the command gmx mdrun -v -deffnm em while doing the energy minimization step but i encountered the error .
Fatal error:
There is no domain decomposition for 8 ranks that is compatible with the given
box and a minimum cell size of 8.09853 nm
Change the number of ranks or mdrun option -rdd or -dds
Look in the log file for details on the domain decomposition
For more information and tips for troubleshooting, please check the GROMACS
website at http://www.gromacs.org/Documentation/Errors
how to rectify this and what does this mean .......please help me out.
I am attaching the files below.