I had found this thread in the SQLServerCentral, and the person talks about disabling Norton Antivirus.
I tried disabling norton antivirus and Window firewall both on the Database server and the Qlikview Enterprise machine, and the error had not take place since then. (Not confirmed whether the disabling solve the issue, but i suppose it might be the case)
However, i feel quite uneasy when norton antivirus was diabled, lots of other threats can take place. Does anyone have a better solution?
Thanks in advance!