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IM frequently disconnects to hub


Article ID: 39343


Updated On:


DX Unified Infrastructure Management (Nimsoft / UIM)


Infrastructure Manager frequently disconnects to the primary hub, but probes in the primary hub are functioning and all permanent queues are ok.

In the hub.log the following errors are recorded:

Jan 21 07:32:00:079 [22920] hub: General error on session

Jan 21 07:32:00:079 [22920] hub: Disconnecting queue route for 'baseline_engine.HTCAAPP01.BASELINE_CONFIG' (error 3 on queue)

Jan 21 07:32:00:483 [5680] hub: General error on session

Jan 21 07:32:00:483 [5680] hub: Disconnecting queue route for 'prediction_engine.HTCAAPP01.PREDICTION_CONFIG' (error 3 on queue)

In the Nimsoft Service Controller window on primary hub server, there is no robot information and client connection to primary hub drops.


Component: UIMHUB  

Release: UIM server 8.x

Windows Server 2008 R2 sp1


The niscache folder under Nimsoft install folder is oversized with more 1.6 million files and more than 300 MB in size. The primary hub performance became degraded and more communication errors for client connections.


  1. rdp to the desktop of Windows server
  2. Open a command line window and change directory to niscache folder
  3. Delete all files using this command: del /Q *.*
  4. Restart local Nimsoft Service


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