If you run ANSYS on Debian, you may encounter the following error message:

error while loading shared libraries: libXm.so.3: cannot open shared object file: No such file or directory

For licensing reasons, Open Motif is not included with Debian.  However, you can download the .deb file from here to allow you to run ANSYS on Debian.  Use “sudo dpkg -i libmotif3…” to install.

(For those unfamiliar with Motif, it is a GUI toolkit that is the foundation of CDE, which was popular for many commercial UNIX systems.  Open Motif and LessTif are free implementations of Motif.  Because ANSYS was developed decades ago, it used Motif, in comparison to the relatively newer Qt use for CFX products, for example.  The Tcl/Tk ANSYS GUI was introduced around version 6.0 or so.)