For Windows systems, make sure rshost is running under the same namespace as the attaching process. This error can also happen when the state manager failed to auto start with an invalid configuration file. The best practice is to use the administration tool to generate and deploy the configuration. If you are hand crafting the configuration file, it is useful to verify your configuration with the rshost utility as part of a verification step before the configuration file is put into use. The best practice to start the state manager is to set it up as a service in a production system.