I'm having a very strange problem with the xstf.exe. This is a standalone program (outside of being partly dependent on Abaqus inputs to get an inp file) correct? Everytime I run xstf on a file right now, Windows claims it needs to be closed or debugged. Could this be an installation issue? I've checked multiple times that the user defined material (it's uni-directional composite so it's pretty easy to define) is being called is correct and have changed where it lives (the asca.env file was changed to reflect the changes) to see if there was some permissions problem because I am on a university computer, but I've not gotten it to work. I've tried making the material through the gui as well as directly with a batch file, and that hasn't helped either. The picture shows the issue it throws when trying to run it. Thanks for any of the help given...