This has really turned into a major irritation. When I'm running my script in the debugger, every few times, I get the error message in the subject line and I have to exit the script and open it back up again from the connected sheet. Then it works for a few more times and the same thing.
Some times I can go a long time without it occurring, but then other times it's every other time I run the script. I see from googling that this isn't just occurring to me, but no real solutions on how to prevent it.
Does anyone know why this is happening and how to avoid it?