I had FrameMaker 12.0.2 and updated to 12.0.4 to fix the problem with SharePoint 2013. The fix was actually in 12.0.3, so I assumed 12.0.4 would include that. But I have the same problem as with 12.0.2 - once I check out a book I can't check it in...it appears locked and check in is grayed out.
So I tried downloading and installing 12.0.3 but that failed.
I suspect you'll have to uninstall the 12.0.4 version first & install the 12.0.3 one to test this out. If you find it busted in .0.4, then report it to Adobe using the Tracker link on the main FM page.
Thanks, Jeff. How do I uninstall the 12.0.4 version to return to 12.0.2?
Hopefully it's listed in your Add/Remove Programs list as a separate line item; if it's not, then I think your only option is to uninstall FM entirely, reinstall with the original build & then add each patch. You could also try a System Restore if you have an image from before the 12.0.4 patch was applied.