Hello Charles,
I see that you are using AutoCAD Mechanical 2012, but this platform is not officially supported for Advance Steel.
Anyway, you can maybe try the following procedure:
- start AutoCAD alone, and reset the CUI files:
- type "CUI"
- on the top-left side of the dialog, you have a tree view with a main category: ACAD
- right-click on ACAD and choose the option "Reset ACAD.cuix"
- press "Apply" and then close the dialog
- open the "Options" dialog and from the Files tab / Support file search patch remove all the links with "Graitec" in their path.
- make sure that in the Customization file (located in the same Options / Files tab) / Main customization file is the correct .cuix file associated to your Autocad installation.
- close AutoCAD and restart Advance Steel 2012
Let me know if this solves your problem.
Regards
Philippe