FileMaker script chokes when Select Window script step fails
Operating system version
Mac OS X 10.8.2 Mountain Lion
Description of the issue
FileMaker appears to hang (not freeze or crash) mid-script when it should not (see screenshot). Note the "Pressed" state of my Postal Codes button. Clicking around in the window or trying to close a window only beeps at me. Opening the Script Debugger reveals that FM is stuck in a script, with no option to continue it (note the grayed out buttons). Clicking the red X / Halt Script button successfully cancels the script, but the symptoms remain the same; it does not bring FM back to "ready" state. The FileMaker Pro > Quit option is also grayed out and unavailable, presumably because FM thinks it's still executing a script.
Only force quitting the application appears to get me out of this limbo state. Restarting and running the same exact script often times does not produce any problems. I've had this problem happen maybe 6 or 7 times since I've started working in FileMaker 12; I've never seen this problem before version 12.
Steps to reproduce the problem
Unknown; it appears to be random.
To have the script continue with any subsequent script steps, of course.
The script appears to pause in an un-resumable state when the Select Window script step is called and the specified window cannot be selected.
Exact text of any error message(s) that appear
Being hosted by FileMaker Server Advanced 18.104.22.168, but I do remember this happening when the file was opened locally. I'm just glad I have it hosted now because of the force quitting 'fix'.