[gmx-users] Problems with g_filter

[Alex Jemulin]

Dear all
I'm trying to use the follow command with a protein in DPPC and explicit water
 
g_filter -s md.tpr -f md.xtc -ol movie_filtered.pdb -fit -nf 5
 
Altough I selected protein group, the command export everything (water + protein + dppc).
 
How can I fix it?
 
Thanks in advance
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