topic HELP! ERROR: Qlikview Server 11.2 and Windows Server 2008 The remote server returned an error: (401) Unauthorized. in QlikView

HELP! ERROR: Qlikview Server 11.2 and Windows Server 2008 The remote server returned an error: (401) Unauthorized.

Mon, 26 Jan 2026 18:19:17 GMT

Using Qlikview webserver installed with the help of Qlikview Support.

The server ran for about a week before stopping.

Now, when trying to start the Qlikview Server Service, the service immediately stops.

From the Event Viewer:

Log Name: Application

Source: QlikViewWebServer

Date: 10/30/2013 2:41:36 PM

Event ID: 0

Task Category: None

Level: Error

Keywords: Classic

User: N/A

Computer: .net

Description:

Service cannot be started. System.ServiceModel.AddressAlreadyInUseException: HTTP could not register URL http://+:4750/QVWS/Service/. Another application has already registered this URL with HTTP.SYS. ---> System.Net.HttpListenerException: Failed to listen on prefix 'http://+:4750/QVWS/Service/' because it conflicts with an existing registration on the machine.

at System.Net.HttpListener.AddAllPrefixes()

at System.Net.HttpListener.Start()

at System.ServiceModel.Channels.SharedHttpTransportManager.OnOpen()

--- End of inner exception stack trace ---

Message was edited by: Bill Britt Remove the server name

Re: HELP! ERROR: Qlikview Server 11.2 and Windows Server 2008 The remote server returned an error: (401) Unauthorized.

Wed, 30 Oct 2013 22:53:43 GMT

Please remove the Server name before allowing post.

Re: HELP! ERROR: Qlikview Server 11.2 and Windows Server 2008 The remote server returned an error: (401) Unauthorized.

Bill_Britt — Thu, 31 Oct 2013 12:09:07 GMT

Hi,

It looks like something is already using port 4750. Need to find out that service has the port open.

Bill

Re: HELP! ERROR: Qlikview Server 11.2 and Windows Server 2008 The remote server returned an error: (401) Unauthorized.

Clever_Anjos — Thu, 31 Oct 2013 12:13:26 GMT

This port 4750 is used by BMC Blade Logic

Using this command into your Windows pront will show who is opening that port

netstat -a -b