How to invoke GetParticipant method to get a Participant details whose scope is "Process"


When I try to get the participant details by invoking the runtime service GetParticipant method for a participant whose scope is “Process”, I am getting the below error.

System.Web.Services.Protocols.SoapException: Cannot find the participant.
at Advantys.Workflow.Web.Services.Processes.Runtime.RuntimeService.GetParticipant(String participantName, String filterFields)

I am getting the same error when I pass a participant name whose scope is process to the web api method, AddAssociationsToParticipant.

How can I use such a participant for invoking the above mentioned API’s?