What causes a feature class to become unversioned

Discussion created by ksjosh82 on Apr 9, 2014
Latest reply on Apr 9, 2014 by ksjosh82
What causes a feature dataset to suddenly become unversioned?  I was editing a versioned feature class adding attachments.  I needed to make an edit to an individual feature and I kept getting an error message that said I couldnt change a table without being in an edit session.  Turns out that the dataset lost its versioning and I had to reregister as versioned.  Is there something causing this to happen?  I also discovered that multiple other datasets in the same SDE geodatabase also had to be registered as versioned again.  I also ran MXD Doctor just to see if the MXD was causing an issue.  As of now, everything appears to be working again but I want to know why this happened in the first place.