[gmx-users] Question about trjorder

[Hwankyu Lee]

Dear GMX-users,

I'm using Gromacs 3.3.1, and trying to collect solvents within specific 
distance from a part of peptide.
I typed "trjorder -f *.xtc -n *.ndx -s *.tpr -o -nshell -da 8 -na 12 -r 
2.5".  I correctly typed reference molecule, and the result of -nshell 
looks OK, but couldn't get the result of "-o" (.xtc).
I wonder if I missed something or there is a bug in trjorder.
Thanks for your help.

best,
Hwankyu.