I have a user with named CAL. He is using QV11.2 in Windows 7. He was able to open a file, but suddenly he cannot open it anymore because he gets this message:
The file is recognized as one your own. However we must update the key i nthe document to reflect changes to your Personal Edition since you created this document.The document will now be updated and loaded without any data. After the operation completes, please SAVE the document and the perform RELOAD.
He can open the same file of a previous month which has the same settings. He has reinstalled QV, we have removed any restriction (section access).
Your user's version of Desktop is not seeing the CAL, so it is running as Personal Edition. It might be that his user name has changed in some way (or some underlying AD changes have affected the license lease) or that he is not connecting to the server to renew the license lease and now the lease has expired.
This lease is normally renewed automatically but he may need to use File | Open In Server to open a server session to get the lease renewed manually.
Logic will get you from a to b. Imagination will take you everywhere. - A Einstein
You can check whether if you have CALs assigned to you via QMC menu: System - tab: Licenses - Qlikview server - tab: CALs - tab: Assigned CALs. If you suspect security issue, make sure you enabled port 4747 in the server firewall.