We recently updated our unstructured FrameMaker 11 to version 12, and now when I update a book using files created in Frame 11, I get this error, "Could not open X document because it was created with a previous version of FrameMaker." I get the error even after I have opened, saved, and closed the file in question in FrameMaker 12, so it is "converted" to the new version.
Thanks for your help!
Becky