I think we all get this from time to time.
Speaking with some programmers, they feel it's a 'collision' in the memory, eityher RAM or virtual memeory. sort of a divide by 0 problem. The first is a piece of info, the second is a memory address.
I bet the error message is usually followed by a 'acad is now shutting down message, and it abruptly ends.
I beleive, that the CPU is happily chuggin away, but something else (outlook checking for new messages) demands a bit of CPU time, and the CPU forgets where it was in Acad, so it crashes.
Despite all these advances with 'multitasking' I still prefer to run Acad, Inventor, or Mech desktop as the only running program. Turn everythign else off: outlook, the web, word, the calculator, etc...
P