Gmx xpm2ps

GROMACS version: 2019.3
GROMACS modification: No

Good day,

I am running a simulation for determination of the secondary structure of my protein, however in the step of : gmx xpm2ps -f ss.xpm -o ss.eps
I encounter the following error and I could not fix it. I would appreciate it if somebody can help me with this issue.

Command line:
gmx xpm2ps -f ss.xpm -o ss.eps

There is 1 matrix in ss.xpm
Matrix 0 is 132 x 122

Program: gmx xpm2ps, version 2019.3

Standard library logic error (bug):
(exception type: St11logic_error)
basic_string::_M_construct null not valid

For more information and tips for troubleshooting, please check the GROMACS
website at

If it helps. I am finding a similar problem trying to convert the xpm output from gmx vanhove to an eps as well. I’ve not had this problem in past versions of the software, so I am wondering if it may be a bug with the output.

This bug should have been fixed in a more recent version in the 2019 and
2020 branches. Please try one of the newer releases.