Hmm. I duplicated a project earlier today in order to try some new ideas. Have spent quite a bit of time on it and it refuses to save. Simple project with no resources. no indication what the issue is - just says "the document “xyz” could not be saved. If I try to Save-as its the same problem.
Any ideas? All is fully up to date including OS, RW and Stacks Plug in and individual stacks.