InstallShield Build Error -4327

I recently started getting an error while building an installation package from the command line with InstallShield (2009):

Error -4327: Could not write string ID "0" to the InstallScript strings file.

Searching the InstallShield KB, I found the following:

Q107858: ERRDOC: Build Error 4327
http://kb.acresso.com/selfservice/viewContent.do?externalID=Q107858

"Make sure that enough disk space is available..." and "Make sure the string text file is not marked as read-only..."

Neither of these were the cause of the problem in my case. After fiddling for a bit, deleting output folders, temp, etc., I resorted to the old version of the three-finger-salute (reboot). Ha! For once, it solved the problem.