Subsurface Utility

I’m trying to edit a structure created with subsurface utilities.  Every time I select the headwall the program crashes.  I’m attempting to learn how to use the subsurface utilities with Bentley’s LearnServer.  This is being done while attempting to complete a project.  I have a very limited knowledge of PowerGeopak, come from Civil 3D background.  Any guidance would be apricated.

 

PowerGeopak SS4, v08.11.09.878