topic Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial few reports in Qlik NPrinting

Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial few reports

Digvijay_Singh — Wed, 05 Feb 2025 19:57:08 GMT

Hello Everyone,

Has anyone came across with this issue as per the image attached?

Here is our current configuration -

Nprinting - Feb 2024 SR3

Qlik Sense - May 2024 Patch 6

The issue occurs intermittently, and re-running the process resolves it.
When the Cycle field contains 100 values, only the initial few reports are affected. The number of impacted reports varies across incidents but is typically fewer than 25. I suspect this might be a synchronization issue between Sense and NPrinting, where the theme is not applied immediately when report generation starts, but everything functions correctly after the first few reports.
Meta data reload is executed before the task runs. Both the meta data reload and tasks are triggered from the Qlik Sense trigger app using APIs.

Please let me know if you need further details. Any assistance on this would be greatly appreciated.

@Frank_S @Lech_Miszkiewicz @Ruggero_Piccoli

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial few reports

Digvijay_Singh — Wed, 05 Feb 2025 21:39:23 GMT

nprinting_engine_cef.log logged this error for each object when the task was running -

20250110T135635.983-06:00 [377] ERROR Engine.Navigator.QlikSense.SDK.Rendering.MashupGrpcServerUpdated - Engine.Navigator.QlikSense.SDK 24.4.5.0 Engine.Navigator.QlikSense.SDK.Rendering.MashupGrpcServerUpdated 20250110T135635.983-06:00 ERROR myserver 0 0 0 0 0 0 0 0 Details error 9da32087-0a0d-4bae-ab2c-89f1fa635a4f. ERROR: System.AggregateException: One or more errors occurred. ---> System.Exception: request with id 2ccf3dd67384483695c57da6d05e1d41 failed with remote error ErrorGenericResult, task CEF_ON_JS_ERROR_MESSAGE_RECEIVED, result: ERROR_JS_FAILURE_RESULT, a JavaScript call failed, app.visualization.get promise rejected for obj: pcPZ, error: vis.rendered.promise rejected for obj: pcPZ, error: visualization rendered an internal error for obj: pcPZ, message: The visualization was not found on the server. This extension is not available: piechart (), type: Type loading error, original: Loading chunk 9559 failed.↓(error: https://myserver/resources/qmfe/sense-client/8.189.14/@nebula.js/sn-pie-chart.3344fb9291e4d55ff463.js), type: error, last js call: qlikPrintingService.renderOnline("f5dda2a3-f592-49a0-b387-5b8493568c97","np17-2feee201-4e50-4f4f-8044-d15503fa8b6a","object","pcPZ","render",{"jsTimeoutMsec":"60000","theme":"theme_nprint"})↓↓ --- End of inner exception stack trace ---↓↓ at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)↓↓ at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)↓↓ at Engine.Navigator.QlikSense.SDK.Rendering.MashupGrpcServerUpdated.Render(RenderParams renderParams) in C:\Jws\release-february2024-YKotfc3yq\server\NPrinting\src\Engine.Navigator.QlikSense.SDK\Rendering\MashupGrpcServerUpdated.cs:line 131↓↓---> (Inner Exception #0) System.Exception: request with id 2ccf3dd67384483695c57da6d05e1d41 failed with remote error ErrorGenericResult, task CEF_ON_JS_ERROR_MESSAGE_RECEIVED, result: ERROR_JS_FAILURE_RESULT, a JavaScript call failed, app.visualization.get promise rejected for obj: pcPZ, error: vis.rendered.promise rejected for obj: pcPZ, error: visualization rendered an internal error for obj: pcPZ, message: The visualization was not found on the server. This extension is not available: piechart (), type: Type loading error, original: Loading chunk 9559 failed.↓(error: https://myserver/resources/qmfe/sense-client/8.189.14/@nebula.js/sn-pie-chart.3344fb9291e4d55ff463.js), type: error, last js call: qlikPrintingService.renderOnline("f5dda2a3-f592-49a0-b387-5b8493568c97","np17-2feee201-4e50-4f4f-8044-d15503fa8b6a","object","pcPZ","render",{"jsTimeoutMsec":"60000","theme":"theme_nprint"})<---
20250110T135636.066-06:00 [151] ERROR Engine.Navigator.QlikSense.SDK.Rendering.MashupGrpcServerUpdated - Engine.Navigator.QlikSense.SDK 24.4.5.0 Engine.Navigator.QlikSense.SDK.Rendering.MashupGrpcServerUpdated 20250110T135636.066-06:00 ERROR myserver

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial few reports

Lech_Miszkiewicz — Wed, 05 Feb 2025 21:42:58 GMT

Hi @Digvijay_Singh

I have not experienced this issue personally with NPrinting as I just dont use images in my reports (instead I use native charts and tables to template). I did however noticed this behaviour directly in Qlik Sense few times and refreshing sheet was fixing it. That makes me wonder if the issue is actually NPrinting or Qlik Sense specific? On top of that this happened to me when the app had sheet triggers and some extensions which were causing issues on the sheet.

I dont know anything about your app, its performance and how it operates on the server and how resposive it is so I cannot comment on that.

thats all from me for now.

thanks

Lech

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial few reports

Digvijay_Singh — Wed, 05 Feb 2025 21:56:08 GMT

@Lech_Miszkiewicz

Thanks for sharing your experience! I haven't encountered this issue in Qlik Sense yet. As I mentioned, it typically appears in the initial few reports. Some of my tasks generate 800-1000 reports, but this issue only affects the first 20-30 cycle value reports, and even then, only occasionally. However, I've noticed that the frequency of this error has increased recently.

Thanks,

Digvijay

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial few reports

Lech_Miszkiewicz — Wed, 05 Feb 2025 22:02:34 GMT

are you using custom theme? Maybe thats what is causing the issue? I would try running it without custom theme and check for the same error. See how you go. Btw-I will have no idea about QS custom themes so someone else would need to comment on that.

cheers

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial few reports

Digvijay_Singh — Wed, 05 Feb 2025 22:13:11 GMT

Yes, we have a custom theme applied. Apologies, I forgot to mention it earlier. The issue appears about 1-2 times in 10-12 runs, so it might be related to a delay in applying the theme, but I'm not certain. I'll run a few tests without the theme, and if the issue doesn't occur in 20 runs, I'll focus more on that aspect.

Thanks for your help!!

Thanks,

Digvijay

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial few reports

Lech_Miszkiewicz — Wed, 05 Feb 2025 22:22:32 GMT

otherwise i think you may want to open support case and provide those details to Qlik Support

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial few reports

Digvijay_Singh — Wed, 05 Feb 2025 22:28:28 GMT

Yes, I opened support case as well today!

Thanks!

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial f...

Frank_S — Wed, 05 Feb 2025 22:51:47 GMT

@Digvijay_Singh

(late to the party but none the less 🙂 )

Yes, I think that is a good call. Opening a case that is.
It will be worked on internally and a team member will get back to you via the support case.

Meanwhile, I think you hit the nail on the head with the latency suggestion.

Just ensure that your meta data reload is actually finishing 'before' the publish task starts.

Also ensure that your Qlik App itself isn't be reloaded by a Qlik Sense task while your NP metadata is reloading.

I would also suggest increasing the image rendering time in the NPrinting renderer.config file (up to 300 secs).

Configuration examples:

renderer.config (June 2020 & newer versions of NPrinting)

<add key="webrenderer-timeout-sec" value="90" />

The above is from this article below. Unfortunately the table layout is not preserved in the copy paste.

https://community.qlik.com/t5/Official-Support-Articles/Upgrade-to-Qlik-NPrinting-June-2020-or-newer-with-modified/ta-p/1700647

I'd suggest using a value of 180 (not 90) to start with. Then increase it as needed (up to 300 secs) until it works.

Hope you are doing well!

Kind regards...

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial f...

Digvijay_Singh — Wed, 05 Feb 2025 23:23:19 GMT

Thanks, @Frank_S, for consistently sharing great tips!

We have a series of events that must occur in a specific sequence, starting from the app reload to the final NPrinting task trigger. This process, managed by the Sense app through sequential NPrinting API calls, has been running smoothly for the past 4-5 years. However, we've recently encountered this issue intermittently—about once or twice in every 15-20 runs.

As suggested, we'll review the renderer.config settings and share our findings soon.

Thanks,
Digvijay

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial f...

Lech_Miszkiewicz — Thu, 06 Feb 2025 01:27:32 GMT

Hi @Digvijay_Singh

for last 4-5 years did you load more data to this app or are you actually reducing "tail" and only keeping say: current and last year or current and only last 2 years.

If process was working before and it isnt currently that means something has changed, Like:

Number of other apps on that Qlik Sense server,
other concurrent reloads on Qlik Sense server
Size of the apps

all above can have a performance impact on how Qlik Sense behaves. I have similar story with my other customer who suddenly said his Qlik Sense is stopping from time to time. It turned out more and more data was loaded, more apps were created and more resources (or apps omptimization) is required, but as you say - it worked until it didnt 😄

cheers

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial f...

Digvijay_Singh — Thu, 06 Feb 2025 14:18:03 GMT

Thanks, Lech, for highlighting some key indicators!

I agree—there have been significant changes over the past 4–5 years. We only load the last two years of data to keep the app size manageable. As I mentioned, the issue is still quite infrequent, and a re-run resolves it. It only affects the initial few generated reports occasionally, with cycle values ranging from approximately 300 to 1000 across different reports. The limited scope of the issue is helpful since I don’t have to check all 1000 reports to identify the impacted slides.

The fact that only a few initial reports are affected suggests that the issue is not related to overall performance but might be a synchronization problem when NPrinting starts fetching chart images (just a hypothesis). I still need to run tests without the custom theme to rule out that possibility.

Thanks,

Digvijay

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial f...

Digvijay_Singh — Thu, 06 Feb 2025 18:53:30 GMT

Hi @Frank_S

Do you know if I can apply custom theme while doing debugging as suggested in this article?

https://community.qlik.com/t5/Official-Support-Articles/NPrinting-incorrect-image-from-Sense-or-CEF-rendering-error/ta-p/1715195

I should have verified this earlier, but I just discovered that the PowerPoint report output for the initial few reports matches the default classic theme. This clearly indicates that the custom theme application is delayed while NPrinting is fetching images from the Sense app. As a result, only the initial few generated reports are affected. In fact, the last error report contains some charts with the default theme and others with the custom theme. Would it be fair to call this an NPrinting bug now? 😊

CC @Lech_Miszkiewicz

Thanks,

Digvijay

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial f...

Frank_S — Thu, 06 Feb 2025 19:50:17 GMT

Ok I have done some further digging as per your comments today and since I'm not clear if your using 'carded' theme or 'extended sheets' this may or may not apply to you.

Please have a look to verify if this is also you.

https://community.qlik.com/t5/Official-Support-Articles/Qlik-Sense-Custom-Themes-Causing-NPrinting-Report-Generation/ta-p/2452336

If yes then it is a Qlik Sense bug resolved in Nov. 2024 Initial Release and later patches and versions. (Defect QB-24997 is quoted therein)

https://community.qlik.com/t5/Release-Notes/Sense-Enterprise-on-Windows-release-notes-November-2024-Initial/ta-p/2494603

Cheers!
ps: otherwise, please try the renderer.config settings since as you said it happens on the first few reports. It still could be a timeout issue.

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial f...

Digvijay_Singh — Fri, 07 Feb 2025 15:32:56 GMT

Thanks @Frank_S for sharing more details.

We do not use carded or extended sheets. Everything functions smoothly most of the time, so I believe once in a while Nprinting starts fetching images before custom theme JS load finishes.

I will follow up after implementing the renderer.config changes and conducting further tests.

Thanks,

Digvijay

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial f...

Digvijay_Singh — Fri, 07 Feb 2025 15:37:24 GMT

@Frank_S

I think you missed my question on debugging related.

Is it possible to apply theme while running this below command in Chrome Dev tool? Currently It applies default theme even though the App I have used in the command has custom theme applied in Sense.

qlikPrintingService.render("f5dda2a3-f592-49a0-b387-5b8493568c97","","object","pcPZ")

Thanks,

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial f...

Frank_S — Fri, 07 Feb 2025 15:48:50 GMT

Actually I want you to run the render.config tests. I did not miss your question.

If the issue persists, then please continue via support case outside. I will work internally with the case owner going forward.

Regarding your question, (and if the issue persists after renderer.config tests), please ask directly in the case but include exactly the steps you are referring to when you say:
"Is it possible to apply theme while running this below command in Chrome Dev tool? Currently It applies default theme even though the App I have used in the command has custom theme applied in Sense.qlikPrintingService.render("f5dda2a3-f592-49a0-b387-5b8493568c97","","object","pcPZ")

A video of your steps provided via the support case would be superior.

Thanks!

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial few reports

David_Friend — Fri, 07 Feb 2025 15:56:28 GMT

@Digvijay_Singh did increasing the timeout have any affect?

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial few reports

Digvijay_Singh — Fri, 07 Feb 2025 16:06:09 GMT

Thanks @David_Friend for your response!

Not yet, we are working with IT to make that happen, but it doesn't make sense to me how that change will help.

How that setting will fix the issue of 'Nprinting capturing few images with default theme and after some time start capturing images with custom theme? and that too once in a while!

Thanks,

Re: Nprinting powerpoint template - Intermittently missing chart colors/text blurred in initial few reports

Frank_S — Fri, 07 Feb 2025 16:25:25 GMT

The renderer.config changes will allow for images that take longer to load, more time to load ie: 180 sec.

The recommendation is based on the logging you shared initially that indicates that the images are timing out.

"Engine.Navigator.QlikSense.SDK.Rendering.MashupGrpcServerUpdated 20250110T135635.983-06:00 ERROR myserver 0 0 0 0 0 0 0 0 Details error 9da32087-0a0d-4bae-ab2c-89f1fa635a4f. ERROR: System.AggregateException: One or more errors occurred. ---> System.Exception: request with id 2ccf3dd67384483695c57da6d05e1d41 failed with remote error ErrorGenericResult, task CEF_ON_JS_ERROR_MESSAGE_RECEIVED, result: ERROR_JS_FAILURE_RESULT, a JavaScript call failed, app.visualization.get promise rejected for obj: pcPZ,"