I'm editing a feature class from a gdb and have been getting the above error quite often. Each time this happens, I lose any edits that I have created since the last save. I'm the only accessing this layer so it's not being locked by anyone else.
Has anyone come across this problem?
Where is the data located?
Do you have any restrictions?
Have you copied to a new gdb and tried editing there?
So you are able to start an edit session, but you are unable to save?
What kind of gdb is this in (personal, file, or enterprise)?