Jim
I fully empathise with some of your problems with IV. I have some issues myself. They have put together a remarkably good working piece of 3d parametric software in a relatively short period of trme. I totally agree with the afore mentioned statement that the software is good if not complete.
Consider that ProE has been activly selling seats sinne the mid 90's, and I believe that Solidworks has been there almost as long. They had a very large head start in this market place, and realistically Autodesk is playing catch-up.
I also get the impression that you never worked on early versions of AutoCAD, like release 2.52 (before mirror, undo, array, to name a few commands). Try doing a regen on a file of maybe 200K, and getting a cup of coffee from the pot and getting back to your seat before the regen finishes (80286 cpu with math co-processor, 1meg of ram, and a 256k of video memory). This was the CURRENT TECHNOLOGY of that time. Customer support was not anywhere close to what you have today, like this posting board to get the help solving issues.
As for your immediate problem, I also have not been able to recreate the problem, provided I understood your gramatically challenged description. For reference, I have tried to reporduce this error on three machines. Machine 1 is an AMD Athalon 1.4 gig cpu, 512 meg ddr ram, Oxyen VX1 32 meg video, running NT4.0 sp6a, Machine 2 same hardware running Win2K, lates sp's, and my home machine, AMD Athalon 600meg slot A cpu, 768 meg PC133 ram, Gilemont Xentor 32meg video running NT4.0 sp6a. Either I am missing something in your description, or you have inadvertently left some pertinent information out.