Guru dudes: As I work my way through the transition from AutoLisp to Vlisp ActiveX, there's an important issue I need to consider. Can I mix AutoLisp functions with Vlisp/ActiveX stuff? And related, how does A2k4 impact this question? I've read the thread, quoted above, by R. Robert Bell dated 10/8/2001. Also other threads related to the same topic, i.e., the eLock error in A2k2 and previous A2kx versions. I have Stephan Koster's latest PreventLockError.arx and I've run Stephan's "test" functions to confirm this mess is a problem while running A2k2 without Stephan's ARX. I think Jason said the eLock error does not occur under A2k4. So this leads to my main question: what's the current read on all these issues? If indeed the eLock error is fixed in A2k4, does that change the "all or nothing" approach? Thanks Joe Burke