I cannot create a new .STS file for this document. I get this error whenever I try to create a new one or edit the Style Mapping.
Does it blow up if you try another doc? Are you all patched up to date?
I tried to edit the style mappings in another document and got this.
Check for updates says that I am up to date.
Then I would give Adobe Support a call - nobody here is going to figure out the error - it's only us mere mortals here ;>)
You have to admire the exquisitely worded caution of the message … may help Frame development […] future releases.
Send in the log-file, for the sake of generations yet unborn :-} It may help.