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This article provides brief information and steps to resolve the issue when Job Scheduler crashes on a polling engine with the following error:
ERROR SolarWinds.JobEngine.Security.UsernamePasswordValidator - SUPPORT: Invalid username or password. Job Engine password files are out of sync. Remove ucdat1.xml on this poller and run configuration wizard to resolve the issue
Check the Job Engine V2 Log files for the error:
All NPM versions
The issue is caused when Job Engine password files are out of sync.
If issue is still occurring we recommend upgrading to NPM 12.1 / SAM 6.4 which contains fixes for this issue.