You can search forum for .pgo files. Delete them, restart your server and reassign all the document CALs. Should work fine. Otherwise, create a support ticket for QV using your Customer/Partner portal.
Thanks for the quick reply Rakesh I thought I would get a get a quick reply on here and hopefully get an answer this evening.
Have deleted all PGO files I could find on the server - had to stop qlikview to delete them - and restarted everything with a good old fashioned reboot but still says 39 unallocated document CALS.
I was under the impression it would reset back to the 50 document CALS.
I have a feeling it is going to be related to fact this server was an evaluation server before we purchased "real" licences.
Will log a call a qliktech.