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Qlik NPrinting SLK License cannot be applied or updated after the upgrade

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Qlik NPrinting SLK License cannot be applied or updated after the upgrade

Last Update:

Apr 26, 2023 9:34:46 AM

Updated By:


Created date:

Mar 18, 2022 9:02:37 AM

Qlik NPrinting SLK License cannot be applied or updated after the upgrade.

Licensing fails with:

The Licence Service is not responding. Restart the Qlik NPrinting License service

Screenshot 2022-03-18 184411.png


The Qlik NPrinting log files read:

"errorMessage":"Post \"\": dial tcp: lookup getaddrinfow: This is usually a temporary error during hostname resolution and means that the local server did not receive a response from an authoritative server.","errorType":"LICENSES-InternalServerError","level":"info","logTraceId":"bf71fd0bcf272dd3528824ac4fb5f3a6","statusCode":500

"error":"Post \"\": context canceled","level":"error","logTraceId":"d7c48ffd76242e3522db613652462ee5","message":"Failed to fetch license definition."

"errorMessage":"Too much time has passed since the last license update","errorType":"LICENSES-OutdatedLicense","level":"info","logTraceId":"e7c3a2cc454f5dc843b68e5bb5e6840c","statusCode":403



This issue is being caused by the license server being unreachable. If the server has internet connectivity, then the likely root cause is a proxy being deployed.

Follow these steps to troubleshoot and resolve the issue:

  1. Login to Qlik NPrinting Server with  Service Account and open Qlik NPrinting Web Console with NPrinting Service Account.

  2. Verify that the Qlik NPrinting License service is up and running.

  3. Try to restart the Qlik NPrinting License service and try to apply for the Qlik NPrinting SLK License before going to the next step.

  4. Verify that the Qlik NPrinting server has an active internet connection and that connectivity to on port 443 is possible from the server running the Qlik NPrinting licensing service.  (You must get "default backend - 404" in the browser when accessed to

  5. In some rare cases, the Server only has temporary access to the Internet, so sometimes it is able to connect to and sometimes not. It needs to have permanent access to the licence-URL, to be able to correctly work.

    If you are in the above rare cases or if the sync doesn't seem to be performed, there is a way to force the sync: remove one/more characters from the SLK License and click to "apply".

    The license will be refused as it's an incorrect one. This action will force the license synchronization. Now, try to apply with an actual SLK License.

  6. If the above did not resolve the issue, check if you have a proxy configured in the NPrinting Server.

    1. Open Internet Options from Control Panel and check for Proxy IP/URL


    2. If the Proxy is configured, do the changes accordingly in %Program Files%\NPrintingServer\NPrinting\License\license.configusing Licensing service proxy Setup 

    3. Make sure to Stop and Start the Qlik NPrinting licensing service before and after performing the changes.



When you upgrade the Qlik Nprinting Server, the existing configurations files will be overwritten to default configurations files, and any changes done before the upgrade have to be updated again.

So make sure to take a backup of the Files (Eg: Config) and Folders before performing the upgrade.



Qlik NPrinting 

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Licensing service proxy authentication 
Licensing Qlik NPrinting offline 

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Last update:
‎2023-04-26 09:34 AM
Updated by: