How to run DSSP

GROMACS version: 2018.3
GROMACS modification: NO

I have been trying to run DSSP analysis by typing: gmx do_dssp -f file.xtc -s file.tpr -o dssp.xpm -sc scount.xvg.

But I got an error saying, “ DSSP executable (/usr/global/whatif/dssp/dssp) does not exist (use setenv DSSP) ”.

How do I resolve this problem? When I was in college a few years ago, I didn’t have this problem (probably because it was the older version of Gromacs and DSSP).

The DSSP environment variable has to be set such that it specifies the location of the dssp binary. You’re being told that the value of $DSSP points to something that doesn’t exist.

Thank you for the reply.
Computing cluster person located the software for me, and I was supposed to use “mkdssp” command, instead.