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I recently upgraded to OS 10.9.1 (Mavericks) & now when I re-open Excel document

ID: 3561948 • Letter: I

Question

I recently upgraded to OS 10.9.1 (Mavericks) & now when I re-open Excel documents I've created they've somehow become Read Only. I only have 1 account on my computer (an Admin account) so this doesn't seem to be the issue. I can do Save As & resave things that way but can't do a cumulative save oncce I've closed the document & re-opened it. I noticed in my Microsoft User Data folder I have 3 different Main Identity Foldeers 2 of which say backed up 11/17/13 but with different numbers below that. Could this be part of the issue? Thanks!!!

Explanation / Answer

I think I just found the answer to your question. U were using a / in the file name when U dated it.
Apparently Excel doesn't like this when trying to save documents in the XLSX format while it was okay under the older XLS format.

I would imagine the reason Excel won't allow a