Missing descriptor

To all,

We are doing testing on Creo3 and Windchill 10.2. When we make a change and try to check it in, not upload, in some cases we have a failure. In the event manager window, if we go to the conflict management information we get the following:

Under the Description it says "Missing descriptor"

Initially we were using IE8 as our embedded browser, so we change to chrome. The problem went away for me, but someone today was testing, made a change and tried to check the part in, again not upload, and he got this conflict now. I had set him up for the embedded browser to be chrome before we even did anything. But for some reason, he was not able to successfully check in a change.

Any help as to what this means would be helpful.

Dennis