topic Re: NPrintingQlik N-Printing Rendering Images from IE errors in Qlik NPrinting

NPrintingQlik N-Printing Rendering Images from IE errors

pasgalbarra — Mon, 25 Jul 2022 11:21:42 GMT

Hi Community,

I have a client with NPrinting (May2022) in a server and then 2 servers (with 2 licenses differents) with Qlik Sense Feb2022.

1 server is working correct, all reports and emails are running as expected, but in the other server connections to app are working, however when we created publish tasks for them they will fail to generate any images, citing ERROR: CEF rendering exception. Error during GRPC request.

The client said he check this article:

https://community.qlik.com/t5/Knowledge/Nprinting-Log-ERROR-CEF-rendering-exception-GRPC-rendering/ta-p/1716137

and everithing is okay.

I checked this article:

https://community.qlik.com/t5/Knowledge/How-To-Check-Open-Ports-Using-PowerShell/ta-p/1714308

And the ports returns failure (see attachment), but their Security team said that the ports are open and they can't find any block there

Any Ideas? Can someone explain to me how the data flows between both servers?

Thanks

Re: NPrintingQlik N-Printing Rendering Images from IE errors

Ruggero_Piccoli — Mon, 25 Jul 2022 12:43:22 GMT

Hi,

In Qlik NPrinting Web Console open the connection that is giving you the issue and do a Run Verification. Everything must be flagged in green otherwise start to solve the issues from the first one.

Ports that must be opened and related firewall rules are listed in https://help.qlik.com/en-US/nprinting/May2022/Content/NPrinting/DeployingQVNprinting/Ports.htm#anchor-3 maybe they opened the ports for the wrong user.

Bes Regards,

Ruggero

Re: NPrintingQlik N-Printing Rendering Images from IE errors

pasgalbarra — Mon, 25 Jul 2022 12:46:13 GMT

Hi @Ruggero_Piccoli ,

The run verification works, everithing is flagged in green

Re: NPrintingQlik N-Printing Rendering Images from IE errors

Ruggero_Piccoli — Mon, 25 Jul 2022 13:33:46 GMT

Hi,

If you run the same test in the screenshot to the Qlik Sense server that is working are you getting the same results?

You could also:

connect via RDP to the Windows computer where the Qlik NPrinting Engine is running using the same domain user that runs the Qlik NPrinting Windows service
Open the Qlik Sense Hub of the server that is giving you the issue
Open the App used to create the reports

Check if you can do those actions without any other interaction with the system like login requests etc.

Best Regards,

Ruggero

Re: NPrintingQlik N-Printing Rendering Images from IE errors

Frank_S — Mon, 25 Jul 2022 18:38:04 GMT

Also check this article:

https://community.qlik.com/t5/Knowledge/NPrinting-Qlik-Sense-Images-Fail-to-Render-Export-Generate-or/ta-p/1713381

Kind regards...

Re: NPrintingQlik N-Printing Rendering Images from IE errors

pasgalbarra — Tue, 26 Jul 2022 09:05:37 GMT

Hi @Frank_S ,

Thanks for your comment.

Checking your steps, I found something that I don't understand, as I mentioned we have 2 Qlik Sense Servers and 1 NPrinting Server.

In this folder:

C:\Program Files\NPrintingServer\Settings\SenseCertificates"

The Client only have the certificate of the server that is failing (it is rename to xx_client.pfx in both places) and in the server that is working, we have the 3 certificates (client.pfx is not renamed), but it's not in the NPrinting server

We should have 2 certificates in the NPrinting server?

Thanks

Re: NPrintingQlik N-Printing Rendering Images from IE errors

Ruggero_Piccoli — Tue, 26 Jul 2022 09:43:01 GMT

Hi,

You have to install the certificates for all Qlik Sense servers you want to connect as described in https://help.qlik.com/en-US/nprinting/May2022/Content/NPrinting/DeployingQVNprinting/NPrinting-with-Sense.htm#anchor-3

So I expect that you will have two certificates in the folder if you want to create connections to two different servers.

It could be that the first Qlik Sense server is working also without certificate in the mentioned folder because it was installed with the old certificates installation method that still work but it has the limit to connect only one Qlik Sense server.

If you forgot to install the certificate of a Qlik Sense server the Run Verification of a connection to it will fail with an explicit error message.

Best Regards,

Ruggero

Re: NPrintingQlik N-Printing Rendering Images from IE errors

pasgalbarra — Tue, 26 Jul 2022 10:01:18 GMT

Hi @Ruggero_Piccoli ,

Thanks for your comment.

The run verification works for both servers, but as I mentioned the client only has 1 certificate in the NPrinting server. Should I copy the certificate from:

C:\ProgramData\Qlik\Sense\Repository\Exported Certificates\QlikNPrintingServerName

"C:\Program Files\NPrintingServer\Settings\SenseCertificates"

Thanks.

Re: NPrintingQlik N-Printing Rendering Images from IE errors

Ruggero_Piccoli — Tue, 26 Jul 2022 10:10:41 GMT

Hi,

Yes, as per the linked instructions but I think this will not solve your issue because, if you have an issue with the certificates, the Run Verification should say that.

To be 100% sure you have not a certificates issue you could export and install a new certificate for the Qlik Sense server that is not working.

Best Regards,

Ruggero

Re: NPrintingQlik N-Printing Rendering Images from IE errors

pasgalbarra — Tue, 26 Jul 2022 10:23:58 GMT

Hi @Ruggero_Piccoli ,

The client did a test in the server that is working (If you run the same test in the screenshot to the Qlik Sense server that is working are you getting the same results?) and confirm that works.

I exported both certificates and added to the NPrinting server, when the client confirm that I can restart the services, I'll do and will see if now works

Thanks

Re: NPrintingQlik N-Printing Rendering Images from IE errors

Frank_S — Tue, 26 Jul 2022 14:28:29 GMT

fyi

https://community.qlik.com/t5/Knowledge/Connect-NPrinting-Server-to-One-or-More-Qlik-Sense-servers/ta-p/1767741

Re: NPrintingQlik N-Printing Rendering Images from IE errors

pasgalbarra — Tue, 26 Jul 2022 14:40:33 GMT

Hi @Frank_S ,

Thanks for your comment.

Actually the client has 4 servers:

xxProd1 and xxProd2 in a domain

jjProd1 and jjProd2 in another domain

Not sure abot this part:

Note that all additional QS servers must be in the same domain as the original QS and NP servers.

Should I have 4 certificates in the NPrinting server folder?

"C:\Program Files\NPrintingServer\Settings\SenseCertificates"

Re: NPrintingQlik N-Printing Rendering Images from IE errors

Frank_S — Tue, 26 Jul 2022 15:00:45 GMT

Same domain deployment where NPrinting is connected to Qlik Sense is a deployment requirement.

https://help.qlik.com/en-US/nprinting/May2022/Content/NPrinting/DeployingQVNprinting/Supported-unsupported-configurations.htm

Re: NPrintingQlik N-Printing Rendering Images from IE errors

pasgalbarra — Wed, 27 Jul 2022 07:42:56 GMT

Sorry, my mistake, they are in the same domain.

Re: NPrintingQlik N-Printing Rendering Images from IE errors

Frank_S — Wed, 27 Jul 2022 14:11:53 GMT

No worries...then I suggest to carefully review and apply the article I recently share regarding connecting to multiple qlik sense servers.

Kind regards..

Re: NPrintingQlik N-Printing Rendering Images from IE errors

pasgalbarra — Thu, 04 Aug 2022 12:57:25 GMT

Hi @Frank_S ,

I tried everithing but I could't fix the issue.

One question:

I Opened NPrinting serve mmc with services account and in:

Certificates - Current User --> Personal --> Certificates and I have a Qlik NPrinting certificates and the same certificate than the server that is working, but I don't have the certificate of the sever that is not working, should I have the certificate here?

(I do have both certificates here: "C:\Program Files\NPrintingServer\Settings\SenseCertificates")

Re: NPrintingQlik N-Printing Rendering Images from IE errors

Frank_S — Thu, 04 Aug 2022 21:38:19 GMT

If you've exported the certificates accurately (no password and include secret key) this is an important component.

The next important component is that you manage the local intranet settings (also in the article I shared with you). Please go back and ensure that you did that. Here are the specific steps. This needs to be done on the NP server and make sure to insert each Qlik Sense server URL that you are using for each specific QS deployment.: