NMC: Modify client wizard generates an error "connecting to host failed: loaded plugin is not signed

Summary: NMC: Modify client wizard generates a pop-up error "connecting to host failed: loaded plugin is not signed.

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Symptoms

  • The NetWorker Management Console (NMC) "Modify client wizard" generates the following error:
    connecting to host <client name> failed: loaded plugin is not signed.
  • The error is seen on the NMC client with NetWorker Runtime Environment (NRE) 8.0.14
  • The error is not seen on the NMC client with Java Runtime Environment (JRE) 8 update 301.

Cause

The plug-in error is due to the Java version installed on the host accessing the NMC.

Resolution

WARNING: NRE 8.0.14 is from 2022 and should no longer be used.

Upgrade NRE to the latest 8.0.x release. NRE can be downloaded from the NetWorker downloads page: Support for NetWorker | Drivers & Downloads 

The NetWorker downloads page only provides the latest NRE version. 19.12.x (and prior) uses NRE 8.0.x. NetWorker 19.13.x (and later) uses NRE 17.0.x.

For more information, see: NetWorker: Runtime Environment (NRE) Releases

Affected Products

NetWorker, NetWorker Management Console

Products

NetWorker Family, NetWorker Series
Article Properties
Article Number: 000215509
Article Type: Solution
Last Modified: 25 فبراير 2026
Version:  4
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