I say "I think" because I'm routinely guilty of operator error, or ID Ten-T error (id10t)....anyway...

In RB's Tracks, the earliest bar is "-1".
So, I used it...not necessarily by design, but when I brought in a BIAB song it was populated.

Well, in RB's Conductor I typed "-1" to define the "intro" section; thats an invalid value. Should be 1-65k. The error notification didn't fire immediately thus allowing me to "leave the error value" in the box. At some point later I got the little yellow error message telling me "invalid value, should be 1-65k"......of course by then my focus had long left the offending box so it took me a LONG time to figure out what it was talkin about.

Further, once focus has left that box with the invalid value, I couldn't refocus to fix it. THe error notification would fire no matter where I clicked. Eventually the message stopped appearring, but the screen was unresponsive....not really locked, just deactivated as though an error notification was awaiting acknowledgment.

ANyhoo....I had to 3-finger salute out to the taskbar & force a shutdown. When I restarted I could immediately go into the conductor field and fix it straight away. The error is easily repeatable.

And...incidentally....conductor works great when you have valid data.