I've read about some support cases in this regard, and it seems to be a issue in the Server v10 SR4. Make sure you have updated to the latest release (build 9282). Have you tried to work around that opening the file using Desktop reloading and saving, then placing the file in the Server again?
Hope that helps.
I've had the same issue and fixed this problem thanks to Troy Raney from Qlikview Support.
I gave the first problematic document one document CAL, requested this document from our Accesspoint without any errors and removed the document CAL.
Everything is okay now.
If this doesn't fix your problem, you should contact Qlikview Support.
There's another Work around.
Troy, thanks again.
Ran into this issue today and discovered that I had the domain name and user id separated with a / instead of a \
Supported point out that if the Last Used date has not been populated, the user id was not making a match and then it falls back to what is available... session cals (in my case).