unable to publish the service in ArcGIS Server

[rajeshkumarg1]

I am unable to publish the Map service in ArcGIS Server and my server is federated with Portal for ArcGIS.

Below is the issue while publishing the service:

Failed to create the service.: ERROR: code:500, 0x80004001 - Class not registered, Internal server error.

Core server call to create service failed (/admin/createService).

Failed to create the service 'UN_Gas_Network.MapServer'. com.esri.arcgis.discovery.servicelib.AGSException: AutomationException: 0x80004001 - Class not registered

[JoeCatanzarita]

I found this old GeoNet thread, seems to be some good advice in here -- Suddenly Can't Publish Feature Services? v10.3.

It may also be worthwhile to ensure that the ArcGIS Server service account permissions are set to all of the necessary install directories.

Best,

Joe