Error in UMP when trying to create and save maintenance schedule

Products

• DX Infrastructure Management
• NIMSOFT PROBES

Issue/Introduction

Error generated when trying to put devices in maintenance. The robots/devices still appear in maintenance but it seems something within the maintenance mode save process is failing after the maintenance mode is created and assigned to the device. Nothing in the wasp.log seems to releate to the issue.

An error was generated when trying to create and then save a maintenance schedule in UMP:

Unknown error.

An unknown error has occurred.
Refreshing your browser may resolve the issue.

Details:
com.firehunter.ump.exceptions.DataFactoryException : I/O error on nim session (C)
com.nimsoft.nimbus.NimNamedClientSession(Socket[addr=/10.xx.xx.xx,port48041,localport=57630]
)
Please check the log for more information.
Stack Trace:
(2) communication error, I/O error on nim session (C)

Cause

- maintenance_mode probe issue

Environment

- UIM 8.51 SP1
- maintenance_mode v8.40

Resolution

Download and deploy maintenance_mode latest version.

Take the same steps again to create and save a few maintenance schedules.