HELP ERROR 401 Qlikview Service cannot be started - Windows 2008 R2 and Qlikview Server 11.2

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: XYZ SERVER

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 ---

Re: HELP ERROR 401 Qlikview Service cannot be started - Windows 2008 R2 and Qlikview Server 11.2

Emmanuelle__Bustos — Mon, 26 Oct 2015 16:37:48 GMT

Hi Gus,

How did you solve this issue?

Re: HELP ERROR 401 Qlikview Service cannot be started - Windows 2008 R2 and Qlikview Server 11.2

Emmanuelle__Bustos — Thu, 29 Oct 2015 16:42:47 GMT

Hi,

We found an app using port 4750, so changin the QVWS port 4750 to another one the problem was solved.

topic HELP ERROR 401 Qlikview Service cannot be started - Windows 2008 R2 and Qlikview Server 11.2 in QlikView

HELP ERROR 401 Qlikview Service cannot be started - Windows 2008 R2 and Qlikview Server 11.2

Re: HELP ERROR 401 Qlikview Service cannot be started - Windows 2008 R2 and Qlikview Server 11.2

Re: HELP ERROR 401 Qlikview Service cannot be started - Windows 2008 R2 and Qlikview Server 11.2