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- Mon Mar 23, 2026 3:51 am
- Forum: Nagios XI
- Topic: NRPE commands returning “UNKNOWN” after NSClient++ upgrade
- Replies: 1
- Views: 805
NRPE commands returning “UNKNOWN” after NSClient++ upgrade
Hi all, I’m running into an issue after upgrading NSClient++ on a few Windows servers (now on 0.5.x). Previously everything was working fine with NRPE checks, but now any external script I try to run returns “UNKNOWN: No handler for that command” or just “unknown command.” I’ve double-checked my nsc...