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Did anyone face this error in Nprinting.
If so, what could be the root cause for this.
Please let me know how to avoid this.
We have the same issue after upgrading to NPrinting Sept'18, our Sense is Nov'17.
I tried to add the port to the connection as shown in this article but it will not 'stick'.
I can add the port and select save, but it is missing when I open the connection back up.
Our current workaround is to bypass our network loadbalancer and point the connection directly to a proxy.
The article says it applies to all versions, but we did not have the problem before upgrading to Sept'18.
We are using Qlik NPrinting September 2018 SR2 Version: 126.96.36.199 and experience this same issue. My report was created last week with no issues, and this worked fine and all of the sudden stopped working today.
I tried adding the port to the proxy url in the connection, but the changes were not reflected by the NPrinting portal.
Restarting the NPrinting services resolved the issue. I'm guessing this will be the fix until a more stable solution is provided.
for all of you getting this issue with Qlik NPrinting November 2018 or newer versions on standard (not third-party extension) objects I suggest to contact NPrinting support.
For NPrinting versions older than Qlik NPrinting November 2018 I suggest doing a simple test:
If you are able to export images right after having disabled the NPrinting engine the issue is probably related to old sessions. If possible upgrade to NPrinting November 2018 or newer versions.
If you instead are still experiencing the issue right after having disabled and enabled again all the engines it is probably related to some other configuration issue and an upgrade could not be enough to solve the issue. In this case contact NPrinting support.
We did find a solution/hack to this issue.
The issue shows up when you have an image or map in the template/report.
The reason for this is sessions. The session which grabs the image from the app stays open. So the next time you are trying to generate the report, you get issues.
Write a task in task scheduler, which restarts the QlikNprintingEngine task everyday.
NET STOP "QlikNprintingEngine"
NET START "QlikNprintingEngine"
This command will restart the service and you won't face any issues.
The resolution was confirmed on: June 2018 , NP, QS and NP Designer.
Thanks and regards,