topic Lost connection to server in QlikView

Lost connection to server

Mon, 26 Jan 2026 18:19:17 GMT

Hello experts,

very often the web browser shows me the message in object even if the session remains inactive for fews seconds.

what it means ?

How can I set this timeout ?

Many Thanks.

Best regards

Lost connection to server

vgutkovsky — Thu, 04 Feb 2010 19:00:50 GMT

Check the settings in the Peformance tab located in QEMC --> System --> QlikView Servers. Specifically, see the "Sessions" section on that tab.

Regards,

Lost connection to server

Fri, 05 Feb 2010 11:11:34 GMT

below the server session parameters settings:

Maximum number of concurrent session:5000

Possible session timeout:
(server may terminate inacive sessions
and re-use slot if needed for other users) : 1800 seconds

Maximum inactive session time:
(0 means no limit): 1800 seconds

Maximum total session time:
(0 means no limit): 0 seconds

I get the "Lost connection to server" message only on some clients very often.

what I'd check on these pc ?

Lost connection to server

vgutkovsky — Fri, 05 Feb 2010 19:02:03 GMT

That doesn't sound like a timeout issue to me, but rather a network issue. Make sure port 4747 is open for that client (both directions). Try adding the server into the Trusted Sites list of the client's IE.

Regards,

Lost connection to server

Thu, 11 Feb 2010 18:35:23 GMT

Vlad,

I have the same error, but I´m connecting directly from server to server. No network is involved, so I think that isn´t necessary the port configuration. The document opens, but when I click another sheet, the message "Lost Connection..." appears and the "You can´t access this document.".

Lost connection to server

vgutkovsky — Thu, 11 Feb 2010 19:15:28 GMT

Can you clarify what you mean by "server to server"?

Regards,

Lost connection to server

Thu, 11 Feb 2010 20:24:57 GMT

Local connection. I´m using the browser from the server.

Regards,

Lost connection to server

rwunderlich — Thu, 11 Feb 2010 21:05:30 GMT

Is the document being reloaded by a scheduled reload?

-Rob

Lost connection to server

Thu, 11 Feb 2010 22:03:57 GMT

No. Is there any configuration to do in Qlikview Web Server to open AJAX documents in Anonymous? The log indicates that the access is in anonymous way, but I´m connected with a valid user, with a CAL assigned.

Lost connection to server

vgutkovsky — Thu, 11 Feb 2010 22:59:33 GMT

Try disabling anonymous access in QEMC --> Security. If you are using IIS, also disable anonymous access (and enable Windows Authentication) on all virtual directories except Scripts. In Scripts, make sure both anonymous and Windows authentication is enabled. If you are allowing Anonymous access, that will be the first authentication method used in some cases, and that's why you won't authenticate as the current Windows user.

AJAX by default always authenticates using anonymous authentication. To change this, open QEMC --> System --> QlikView Web Servers --> AJAX tab. There is a checkbox there "Always anonymous." If you are using IIS, I think you will then also need to make sure you are allowing anonymous authentication on the QvAJAXZfc virtual directory (not sure about this).

Regards,

Lost connection to server

Fri, 12 Feb 2010 18:26:57 GMT

The QEMC isn´t working. The Command Center Service is down in Status sheet, and others sheets are inacessible. An error occurs when I click in any sheet. I did the reinstall, but with no success. I think that is a problem with Qlikview Server name. Is there a file configuration that I can modify the Qlikview Server name (The same name that appears in sheet System\Setup\Command Center\Qlikview Servers)?

Lost connection to server

vgutkovsky — Fri, 12 Feb 2010 18:40:40 GMT

With all services stopped, I would check these files:

C:\ProgramData\QlikTech\QlikviewManagementService\config.xml
C:\ProgramData\QlikTech\Publisher\CommandCenter\QVPR\QlikViewServerResource.xml
C:\ProgramData\QlikTech\QvWebServer\config.xml (check the contents of the <AddQvs> tag)

C:\ProgramData is C:\Documents and Settings\All Users\Application Data on older operating systems. Then try starting your services again. If the error still occurs, post the Event Viewer log here.

Regards,

Lost connection to server

Fri, 12 Feb 2010 21:23:55 GMT

I fixed the C:\ProgramData\QlikTech\QlikviewManagementService\config.xml file and the Command Center Service started! All functions of QEMC are working now, but the Access Point stopped working. Now I have the message "No Server" and all the services are running, including Qlikview Server.

Lost connection to server

vgutkovsky — Fri, 12 Feb 2010 23:56:36 GMT

Sounds like a problem with the config file in the QVWebServer folder I mentioned above. If the QV service is running, it probably means that the resource is defined incorrectly. Did you check this other file as well?

Regards,

Lost connection to server

Wed, 17 Feb 2010 16:15:32 GMT

Vlad, I was precipitated. QV, sometimes, has a delay to refresh the timing between QEMC and services. All services are ok, including que Access Point. But the "Lost Connection" message is still there. It´s curious, but I have the same problem accessing a QV document in www.qlik.com, with AJAX. I can´t remember the document name.

Lost connection to server

Wed, 14 Sep 2011 15:29:05 GMT

Hi Rob,

I have received this error for the first time recently with a client using ajax to view the file in IE8 on Vista.

We do a scheduled reload at 01:00 GMT and that is all.

Any clues on why this would suddenly appear in AJAX?

Thanks

Lee

Re: Lost connection to server

rwunderlich — Wed, 14 Sep 2011 18:03:46 GMT

First place to look for an explanation is the event*.log of the QVS and see if QVS killed the session and why.

-Rob

Lost connection to server

Wed, 14 Sep 2011 20:11:16 GMT

I was running into this a lot when we first setup our QV servers. The solution that worked for me was to stop using IIS.

We tried and tried and tried to make QV Server run smooth through IIS but sometimes it's just a losing fight.

Re: Lost connection to server

Wed, 23 May 2012 14:31:49 GMT

I get this message anytime I try to launch an app from the QlikView Demo Page using my Samsung Galaxy S2 with Android 4.0.3 mobile device. No problems accessing any other web pages or demo apps from other vendors with the same device. No problems launching the QV demo apps from my notebook. I need to show a smartphone accesing QV apps to a client in the next few days.

Re: Lost connection to server

Wed, 23 May 2012 14:59:57 GMT

I know it does not solve the your underlying issue but I have no problems personally with the iOS App if you can lay your hands on iPhone or iPad.

Perhaps that will suffice for a demonstration in the short term

Cheers

Lee