Certain CAD/CAE/CAM software utilizes the DirectX subsystem to display data. Dimdim
currently cannot support applications which use DirectX / OpenGL (for e.g. In
linux) due to the way graphical subsystem bindings are done. If there is a
possibility of a non-DirectX version of CAD/CAE/CAM or non-DirectX way of
running your existing software, Dimdim should work.
If you have any options in your software which allow you to disable use of
DirectX rendering, it would help.