(I am still on vacation, but can't resist to leave this unanswered...) Ian, All you need to do is open the IBIS macro library file with a text editor, look up the function you are interested in and read its comments (which are currently being finished by Mike LaBonte) and find out what the element does. If that is not enough, you can scroll down a few lines and read the implementation of the element itself. I don't understand why you would say "without knowing"... It is all there in ASCII readable format. Arpad ============================================================== ________________________________ From: Dodd, Ian [mailto:ian_dodd@xxxxxxxxxx] Sent: Friday, November 10, 2006 9:50 PM To: Muranyi, Arpad; ibis@xxxxxxx; ibis-macro@xxxxxxxxxxxxx Subject: Re: [ibis-macro] Re: Your presentation at Asia Summit Arpad, I agree the situation is frustrating. Prehaps you might like to comment on whether it is OK to pass parameters to macro-models without knowing how they are implemented? Bob, I agree with most of your comments. Ian Ian Dodd Architect, High Speed Products Mentor Graphics SDD Division Office: (720) 494 1197 Cell: (303) 881 0558 Email/Blackberry: Ian_Dodd@xxxxxxxxxx