[gmx-users] request

[baldelli.ilaria]

Hi!
I'm a new Gromacs user. I'm using the g_msd to calculate the mean square displacement of a membrane's phospholipid, but the program doesn't work. I controlled a lot of times the input files, and I think they're right (g_msd -f traj.xtc -s confout.gro -n index.ndx ). Why the program shows "Reading frame  0time  0.000  Floating exception"? What would be my mistake? 
Thank you 

Ilaria



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