NetWorker: NMC Launcher Fails with 'Unable to Read or Parse JNLP File'

• NetWorker Management Console (NMC) fails to launch.
• Error message:  

Could not read or parse  the JNLP file

• OpenWebStart was configured correctly as per article NetWorker: How to Access NMC After Upgrading To 19.13
• Issue affects multiple Windows desktop users.

A possible cause is corruption, or misalignment in the cached Java Web Start (JNLP) configuration, particularly:

• Residual or outdated Java Virtual Machine (JVM) paths in OpenWebStart settings
• Cached JNLP files that are incompatible with the current NetWorker version.
• Improper shortcut or launcher configuration after upgrade

To resolve the issue, follow these steps:

1. Open OpenWebStart settings (itw-settings).
2. Remove the existing JVM path manually.
3. Reselect the correct Java path.
4. Clear the OpenWebStart cache. See article NRE 17.x: How to Clear Java Cache, Enable Java Console, and Debugging
5. Launch the NMC user interface. Download a fresh gconsole.jnlp file from the NMC server.
6. Edit the JNLP file manually if necessary (for example, to correct paths or parameters).
7. Create a new desktop shortcut pointing to the updated JNLP file.

After applying this workaround, NMC should launch successfully across affected Windows desktops.

Ensure that the Java version selected in OpenWebStart matches a Java version supported by NetWorker 19.13. see article NetWorker: How to Access NMC After Upgrading To 19.13.