IDCS3 error message "Cannot add data to unknown document"
I am using a Mac and last week I opened an ID document from my flash drive, worked on it, saved it back to my flash drive and reopened it just to make sure it saved right. Now when I try to open it, it says "Cannot add data to unknown document". All the permissions look fine. Is it a file problem? Is there anything I can do to recover it?
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