NPrinting Qlik Sense Images Fail to Render Export Generate or Preview

Frank_S — Tue, 06 May 2025 16:09:47 GMT

Description:

Qlik Sense Images fail to Render Export Generate or Preview in NPrinting Designer or in NPrinting Web Console Publish Tasks

Environments Affected:

All Supported NPrinting versions

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Note: Before proceeding to the resolutions section:

Restart Qlik Sense services
Restart NPrinting services
Retest

If issue persists, proceed below:

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Resolutions:

1. Check & Update NPrinting Report and Reload NPrinting Connection

Click the Entity Checker button in the NPrinting Template editor and retest
This will ensure that the object or objects are valid (older versions of NPrinting may not have the object 'Entity checker' feature).
Right click on each table object and select 'update' from the context menu to update tables changed in the source QVW or QVF.
Save and close the report
Reload the NPrinting Connection
Open and preview the report
Move on to steps 2 through 5 if this does not solve the issue

NOTE: The following steps must be performed on your NPrinting Server/NPrinting Engine Computers.

2. a. Disable IE Enhanced Security on the NPrinting Server:

https://help.qlik.com/en-US/nprinting/Content/NPrinting/Troubleshooting/Internet-explorer-security-config.htm

2. b. Update Intranet Security settings:

Log onto the NPrinting server as the NPrinting service account (or run/as the NP scheduler service account and access internet options via the IE browser then follow the steps below).
Go to '
- 'Internet Options'
- 'Intranet Security Settings'
- 'sites'
- 'advanced'
In the field 'add this website to zone' insert the FQDN address path of the Qlik Sense virtual proxy server. Use the central proxy address of your Qlik Sense deployment here as well as in your NPrinting connections proxy address path. (Insert both as shown below if applicable)
- Ex with computer name: https://myqliksenseserver.domain.com
- Ex with alias name: https://myaliasqliksenseaddr.domain.com

Reference: https://help.qlik.com/en-US/nprinting/Content/NPrinting/Troubleshooting/NP-wont-read-QS-certificates.htm.

PLEASE NOTE:

This step must be done while logged on as the NPrinting Scheduler Service domain account for these settings to take effect across the enterprise.
Then NPrinting and Qlik Sense servers and the domain user account(s) which runs the NPrinting services must all be members of the same domain.

(Note: It may be necessary to go on to step 3 below if steps 1 and 2 do not resolve the issue)

Note: Proceed to Step 3 if Resolution 1 and 2 do not solve the issue:

3. Enable increased timeout values

on the renderer.config file to as high as 300 secs. This is mentioned here and resolution 4 therein:

https://community.qlik.com/t5/Official-Support-Articles/Advanced-troubleshooting-of-the-GRPC-and-or-CEF-Errors-in-Qlik/ta-p/1806741

4. Ensure that you have disabled IE Enhanced Security on your NPrinting server

https://help.qlik.com/en-US/nprinting/Content/NPrinting/Troubleshooting/Internet-explorer-security-config.htm

5. Check to ensure that the NPrinting server and Qlik Sense server are using the same cryptography.

If the NPrinting windows server system logs are showing many SChannel errors, this may indicate the NP server cryptography is not aligned with the Qlik Sense server
Resolution: To resolve this as per as per https://help.qlik.com/en-US/nprinting/February2024/Content/NPrinting/DeployingQVNprinting/TLS-cipher-suites.htm you may either
- manually configure the supported cryptography on NPrinting Server to ensure it matches your Qlik Sense server crypto settings as per the link above
- use IISCrypto and use the 'Best Practices' option to set your crypto.
- If you are hardening your Qlik Sense server, be sure that you do not remove required crypto needed to communicate with the NPrinting server.
- Each Qlik Sense node should have the required NPrinting crypto configuration in common

6. Content Security policy settings in Qlik Sense can cause images in NPrinting to fail

The use of CSP (content security policy settings), this may be the root cause if none of the above is working. In this case you may simple remove the 'additional headers' in Qlik Sense or add the required 'additional headers as needed. Please work with your IT security team to determine the correct 'additional headers' for your specific environment.

https://community.qlik.com/t5/Official-Support-Articles/How-to-add-additional-response-headers-in-Qlik-Sense/ta-p/1717563

Finally, if none of the above solve the issue, please use the following to gather the HAR file necessary to investigate the issue and start a support case

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

Re: NPrinting Qlik Sense Images Fail to Render Export Generate or Preview

Hoover — Wed, 06 Jan 2021 17:13:47 GMT

Hi Frank,

I've tried the steps under resolution however i still experience the same problem.

What i have noticed is that when generating the cache / Reload Metadata under connections, then editing the template on the report, preview the report, there some images that are not displayed. This behaviour is erratic.

I am currently using Qlik Sense version : September 2020 Patch 4 and Nprinting version : September 2020.

article NPrinting Qlik Sense Images Fail to Render Export Generate or Preview in Official Support Articles

NPrinting Qlik Sense Images Fail to Render Export Generate or Preview

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Re: NPrinting Qlik Sense Images Fail to Render Export Generate or Preview