topic Qlik Sense On-Demand nPrinting Unable to Connect in Management & Governance

Qlik Sense On-Demand nPrinting Unable to Connect

mbespartochnyy — Sat, 16 Nov 2024 04:10:46 GMT

Hello everyone,

I'm struggling with a very strange issue. I've installed Qlik Sense (September 2019) along with Qlik Dashboard bundle on server 1. On server 2, I installed nPrinting Server (April 2019) and nPrinting Engine (April 2019).

Here's the list of all the things I've already done:

Made sure that both Qlik Sense server and NPrinting server have certificates and are accessible using HTTPS URL without "unsecured connection" message in a browser
On Qlik Sense server (server 1), added inbound rule for ports 4242, 4343, and 4747
On nPrinting server (server 2), added outbound rule for ports 4242, 4343, and 4747
Made sure that service account that I'm working with (let's call it nPServiceAccount) is part of Administrators group on both servers
Made sure that nPServiceAccount is a user with RootAdmin role in Qlik Sense QMC
Exported certificate for NPrinting server from Qlik Sense QMC
Installed certificates on NPrinting server using QmcCertificateInstaller.exe
Added NPrinting server address and fully qualified domain name to trusted origins list in Qlik Sense Web Console
Added Qlik Sense server address and fully qualified domain name to trusted origins list in Qlik Sense Web Console
Created a dummy app in Qlik Sense hub using nPServiceAccount
1. In the app I've created a simple bar chart and a line chart
Created an app and a connection in NPrinting Web Console that connected to a dummy app in Qlik Sense Hub
1. Connection reloaded metadata successfully
Created a dummy HTML NPrinting report that displays two of the charts from dummy Qlik Sense app mentioned above
1. Made sure that Enable On-Demand and API report generation is checked for this report
Back in Qlik Sense dummy app, I added an On-demand reporting button
1. For the on-demand button in the dummy app, I've entered FQDN in Server Connection input box
2. Selected the NPrinting app and connection (that I've created in step 10) in the Choose App and Choose Connection dropdown lists
3. In Report Configuration settings, I've selected the name of report I've created in step 11 and selected HTML as the value in Default Export Format dropdown list.
4. Clicked Done to exit the Edit mode for the app.
5. No issues here at all.
Clicked the on-demand button that I just configured and this window came up:
I clicked, New Report to create a new report that I could export and this window came up:
I selected the Sample Report report and this window came up:
I selected HTML and saw this:

When I look at the JS Console in Chrome, I see this message when the Unable to connect to server window pops up:

I looked through several community posts, instruction documents, YouTube videos and couldn't find a solution.

Has anyone faced this issue before? Is there a solution?

Thanks,

Mikhail B.

Re: Qlik Sense On-Demand nPrinting Unable to Connect

mbespartochnyy — Thu, 28 Oct 2021 17:00:33 GMT

Found the issue. I've added a fully qualified domain name of the Qlik Sense server as well as fully qualified domain alias names to the list of trusted origins. I didn't, however, add non-fully qualified domain names. My list of trusted origins was something like this:

What I failed to list are non-qualified domain names:

As soon as I added non-FQDNs, on-demand report button worked like a charm.

Button worked well for the owner of the app, but now users get a Server access blocked by server error message when they click the on-demand button.

Next post, Qlik Sense On-Demand Server Access Blocked by Server...

Re: Qlik Sense On-Demand nPrinting Unable to Connect

zbeauchemin — Wed, 19 Feb 2020 18:42:06 GMT

Where did you add the FQDNs? in nprinting somewhere?

Re: Qlik Sense On-Demand nPrinting Unable to Connect

mbespartochnyy — Wed, 19 Feb 2020 18:56:23 GMT

In nPrinting. Go to Admin > Settings > On-Demand and click on Add Trusted Origin button.

Re: Qlik Sense On-Demand nPrinting Unable to Connect

zbeauchemin — Wed, 19 Feb 2020 19:15:46 GMT

That worked! Thank you

Re: Qlik Sense On-Demand nPrinting Unable to Connect

pglezluna — Tue, 15 Sep 2020 10:52:37 GMT

Thanks!! It worked for me after upgrading NPrinting to the same version of QS (2020JUN). I tried it in an earlier version of NP but it didn't work