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Article ID: 124810, created on Mar 11, 2015, last review on Aug 1, 2015

  • Applies to:
  • Plesk Automation 11.5


PEM service on the windows-based service node does not listen to port 8352. It results in service node availability - microupdate cannot be installed due to the error:

Check the following hosts:
        * The host WIN-1-1 is not available: make sure it is up and POA agent (the "pem" service) is running there.
        * The host WIN-1-2 is not available: make sure it is up and POA agent (the "pem" service) is running there

The error report from Event Viewer show that PEM service cannot be started - it failed each second with the error:

The description for Event ID 6 from source POA cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.
If the event originated on another computer, the display information had to be saved with the event.
The following information was included with the event:
POA Agent
The specified resource type cannot be found in the image file


Service Node hostname was changed, but PEM settings were not updated.


IMPORTANT: Make sure 'Computer Name' and 'Full Computer Name' (in computer properties) are equal. Otherwise it will cause the conflict and PEM service will not start.

  1. Check the real service node hostname:

  2. In registry editor find HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\SWsoft\PEM\<hostname>
  3. Create its backup (Right click > Export)
  4. Find the keys,,
  5. Key values and the folder name (here <hostname>) should be a real hostname (from step 1). In this example these values should be WIN-1, and the target folder should be HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\SWsoft\PEM\WIN-1

  6. Restart PEM service.

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