Lost OBI work

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Has any one had an analysis basically revert to an older state from weeks ago, all the work you've made lost? I had it happen over the weekend. I put in a lot of hours for, what my basic OBI ability mind would call, a complex analysis. And this morning it's gone. The same analysis is now a version that I started on almost a month ago.

I opened a ticket 5 hours ago, haven't heard a peep from Oracle. I'm trying to recreate it, but like a rookie, I didn't document much on what I did. Was too excited it worked.