Here's a question that may not have an easy answer, but it might be useful to know: When TurboCAD encounters an Unhandled Exception error (with error message) or crashes (TC instantly disappears), does something change in the program/configuration itself? Or should one be able to restart the program (or restart the computer) and have everything go back to the way it was before the UE/crash?
Here's the situation that led to my question: Yesterday, while answering a question on the forum, I attempted to load TC. Without realizing it, I clicked on TC while my anti-virus program was downloading an apparently large update, and I think there was a conflict. This lead to TC not showing up, then me re-clicking TC, then two or three separate UE error screens. After the program update ended, I reloaded TC and my file with a Parametric Part, then tried to draw new lines with constraints in the normal workspace on the default workplane. The instant I hit (any) constraint button, TC completely disappeared. I tried it multiple times with the same result, then restarted the computer, but even then TC would disappear.
The problem finally ended after I restarted TC and started a new drawing and used constraints there first. From then on, I could use constraints in the old file just fine, even though I have not saved any modifications. The old file is just the same as it was before the crashes started. And I just tried it again now--everything seems to be working okay.
So, that brings me back to my initial question--does anyone know why such things happen? Does TurboCAD change itself somehow after a crash in such a manner that even a computer restart doesn't fix it?
Thanks for any insight...