Pack and Go Failure

I am trying to use Pack and Go onapart, an assembly, on anything.  And it never works. Mysolidworks goes unresponsive until I go to CRTL+ALT+DEL andIselect "end now" from my windows task manager.  Windowscomesback and asks if I want to send an error report.  Anyideawhat is going on?  It is like there is a dialogue boxopensomewhere that is freezing up the program but I minimizewindowsand I can't find it.SolidworksAssemblies