On 09/28/2013 09:42 AM, rajat desikan wrote:
Hi,
I am not sure, but try resname SOL or something similar. Also, your first
line has waterO and second line has water0.

Hi Rajat:

thanks a lot for such kind and helpful comments. It works now. I run it by command:

g_select_mpi -f ../md_pbc_center.xtc -s ../md.tpr -on density.ndx -sf select.dat -os size.xvg -oc cfrac.xvg -oi index.dat

I am trying to make density of the water molecules inside my protein by g_density:

g_density_mpi -f ../md_pbc_center.xtc -s ../md.tpr -ei density.ndx -o density.xvg -n density.ndx

but it asked me which water molecules I would like to make..... Do you have any idea how to do this correctly?

thank you very much.

best
Albert

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