Hi i'm getting this line from a nohup.out file. I am trying to run grompp 
in a loop for several files and the script is not working. What does this mean?


creating statusfile for 1 node...
calling /lib/cpp...
cpp exit code: 256
Tried to execute: '/lib/cpp -I../top
-I/home/diana/software/gromacs-3.3/share/gromacs/top  1bq8zn.top >
gromppgr1Igp'
The '/lib/cpp' command is defined in the .mdp file
processing topology...
turning H bonds into constraints...