topic Can't open document via QVSTunnel.dll if port 4747 is blocked on client side in QlikView

Can't open document via QVSTunnel.dll if port 4747 is blocked on client side

emotyp101 — Mon, 26 Jan 2026 18:19:17 GMT

Hello,

my problem is that I cannot open documents with the internet explorer when the port 4747 is bocked. If this port is open on the client machine, the IEPlugin will be used to establish the connection to open the document.

If I now block this port in my firewall locally to test the document opening via QVSTunnel.dll it does not work.

I always get the error message:

server1 is our company domain so I've made it black.

We recently updated to QlikView version 12.10.20600.0.

Maybe something changed to this procedure?

Kind regards

Gero

Re: Can't open document via QVSTunnel.dll if port 4747 is blocked on client side

jhonray — Fri, 07 Apr 2023 06:31:29 GMT

If you can't open your document due to missing QVSTunnel.dll files then you can easily download these missing dll files and fix you system problem.

Re: Can't open document via QVSTunnel.dll if port 4747 is blocked on client side

Chip_Matejowsky — Fri, 07 Apr 2023 11:11:23 GMT

Port 4747 is used by the QlikView Protocol (QVP) for communication. It is typically open in all QlikView Server/client environments. Refer to the QlikView Help entry: Ports for more details.

The posted error message is returned when trying to use the IE Plugin client and port 4747 is not open. This is working as designed. Refer to Qlik Knowledgebase article The QlikView QVP (4747) protocol and Tunneling .

Best Regards