Archive from user: Yuxuan Zhuang When using gromacs 2019.2 **gmx xpm2ps**, following error raises: Standard library logic error (bug): (exception type: St11logic\_error) basic\_string::\_M\_construct null not valid I have attached the xpm file, which is generated from **gmx densmap**, and the error log file. *(from redmine: issue id 3012, created on 2019-06-27 by gmxdefault, closed on 2019-07-02)* * Changesets: * Revision cec89bf235eec4f9a4f9aac5d42eaecdededdbc1 by Paul Bauer on 2019-07-02T07:06:50Z: ``` Fix bug in gmx xpm2ps When not providing the name for a library input file the program would try to create a null string and fail with an assertion failure. Fixes #3012 Change-Id: Ifd69af5420cdac2f624246aee09f36219b3f6aeb ``` * Uploads: * [xpm2ps.zip](/uploads/b62eabc860dee07557e5a25ea4ba6833/xpm2ps.zip)