Ok...not sure what is going on with SW..but these little errormessages that keep popping up are getting very annoying.  I did asmall change to a part that is part of an assembly.  When I wentback to update my assembly, I receivedthis error (an invalidargument was encountered) then SW shuts down...hmmmm...I know for afact at the time this happened, SW and I were not arguing!!Anyoneseen this before??Rob LittletonSenior DesignerXI MTower 2P64Workstation2 x AMD Opteron 2214 64bit Dual-Core8GB DDR2 667mhzRamNvidia Quadro FX 3500Windows XP x64SolidWorks 2007 x64 SP3.1