This is the most common error reported by those of you submitting automated error reports. The good news is that I have a fix. The bad news is that fix is in 1.1 and not released yet. The other good news is that 1.1 is a free update. The final piece of good news is that there's a workaround for this in the meantime. That's Good 3, Bad 1.
The symptom you have is that you're drawing on one map or tabletop, you go to another map or tabletop and start drawing on it and BAM! You're prompted to send an error report.
Here's a sequence of steps that reproduces the problem
- Create a couple maps or tabletops.
- Go to draw mode by clicking on the Drawing tab.
- Now, click on a different tab (a different tab in the ribbon or a different map/tabletop tab).
- Go to draw mode on that tab. BAM!
If that matches your scenario, you're in luck. Not only is a fix on the way, but in the meantime, if you click "Exit Draw Mode" before you switch tabs, you should be fine.