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When attempting to publish a feature service in ArcGIS Server, the attempt fails and the following server log error is returned, "[geoprocessing system service name] system service is missing." For example:
Error: PublishingToolsEx system service is missing
System services are used by ArcGIS Server to publish service definition files as services.
In some cases, upgrading ArcGIS Server to 10.5 and above causes some geoprocessing server services to change or go missing. This is because prior versions use the same service with a different name. For example, the PublishingTools system service is referred to as PublishingToolsEx in 10.5 and above. Upgrading to 10.5 and above causes ArcGIS Server to refer to the old geoprocessing server service name instead of the new name.
The geoprocessing system must be recreated to enable publishing. The following steps demonstrate how to recreate the PublishingToolsEx geoprocessing service.
Note: Other missing geoprocessing systems (for example, DistributedWorker or RasterRendering) can be recreated using the same steps provided.