Nprinting reports stopped working after upgrading the Nprinting server from May 2022 SR4 version: 22.15.14.0 to Feb 2024 SR2Version:24.4.10.0

[Swarup_MOA]

Hello,

After upgrading the Qlik sense Npritning server   from May 2022 SR4 version: 22.15.14.0 to Feb 2024 SR2Version:24.4.10.0.

I started getting the following error, when i try to generate a report using OnDemand button. I see the same issue when I try to run preview on the template. The same te,plate works fine on the older version of NPrinting server May 2022 SR4 version: 22.15.14.0 

Thanks

Swarup

[Frank_S]

Hi @Swarup_MOA 
1. check to ensure that there are no report filters associated with the NPrinting Report. If found, remove them from the report. This should be done for reports use with On Demand since this could cause filter conflicts. 

• https://community.qlik.com/t5/Official-Support-Articles/How-to-manage-Qlik-Sense-NPrinting-On-Demand...
• Adding filters to a report

2. Check that you aren't using 'calculated dimensions' or any other unsupported items in your Qlik Sense App. 

• Unsupported Qlik Sense objects (these also apply to QlikView).

(move calculated dimensions etc to the load script so they can be used and basic dimensions with NPrinting.)

If any unsupported items are used, suggest that you

1. -create copy of the app
2. -remove unsupported items from the copy. Use the copy for reporting purposes.
3. -reconnect your NP connection to the new app ID and reload the NP connection
4. -retest

If the issue persists after following above, please do start a support case.

[Swarup_MOA]

Thank you Frank.

I followed the steps recommended by you. Unfortunately that did not fix the issue.

After making the recommended changes, now I get this error:

Would you by any chance know the type of log file, that would give me details regarding this errror?

[Frank_S]

Sure.

Check the NP web engine, scheduler, engine, CEF_Engine logs.

However check the following points as well.

• Does your app contain 3rd party visualizations by any chance?
  • We have already found that some list box filters (3rd party) do not work nicely with NP On Demand or in the Qlik Sense app with NP reports.
    If yes, try using default Qlik native charts and visualization objects/bundles.
• Ensure you are not using some kind of 3rd party integration/extension in MS office (assuming this is an excel report) to bring in external data while previewing the report.
  • QVFs and QVWs are the only connection sources that are allowed
• Check if you have linked to another QVF or QVW via binary load from the primary reporting QVF or QVW.
  • The same limitations described above also apply to the binary loaded document as well. Unsupported Qlik Sense objects

Kind regards..

[Swarup_MOA]

Thank you Frank. The primary app is linked to another qvf via binary load . Which did work fine in the lower version of Nprinting server.

Unfortunately after the upgrade, it stopped working

[Frank_S]

No worries Swarup... but nevertheless, as long as there is unsupported items as mentioned above, you'll need to address that...even if it worked before.

Unsupported Qlik Sense Object Support and L... - Qlik Community - 1717018

Unsupported QlikView Document item... - Qlik Community - 1714896

Kind regards...

[David_Friend]

unfortunately that is often the behavior we see with unsupported objects, the customer 'gets away' with using them in one version, but after an upgrade they stop working 😞

[Swarup_MOA · Accepted solution]

Hello Both,

The issue was cause by a variable under the formula. The variable was not initialized with any value. The current version of NPrinting does not support variables with null values in the NPrinting template.

After deleting it, the report started working.

Thanks

Swarup