Invalid Party Object Type 4002

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  I am trying to create a Service Appointment though code.  I am developing against Dynamics 365.

  I am using a resource (as apposed to a system user in the Resource Party List.

  For some reason I am getting the following error:

  "An exception of type 'System.ServiceModel.FaultException`1' occurred in Microsoft.Xrm.Sdk.dll but was not handled in user code

  Additional information: Invalid Party Object Type 4002"

  Yet the Service Activity should be able to accept the resource. 

  Here is my code.  Hopefully it provides enough information for someone to see what I have done wrong here:

  public Guid CreateAndReserveAppointment(AppointmentProposal proposal, Guid resourceId, Guid serviceId, Guid incidentId)
          {
              Guard.ArgumentIsNotNull(proposal, "proposal");
  
              ActivityParty resourceAP = new ActivityParty
              {
                  PartyId = new EntityReference(Resource.EntityLogicalName, resourceId)
              };
  
              ServiceAppointment appt = new ServiceAppointment()
              {
                  Subject = RESERVED_APPT_SUBJECT,
                  ScheduledStart = proposal.Start,
                  ScheduledEnd = proposal.End,
                  ServiceId = new EntityReference(xrmHelper.Service.EntityLogicalName, serviceId),
                  RegardingObjectId = new EntityReference(Incident.EntityLogicalName, incidentId),
                  Resources = new ActivityParty[] { resourceAP }
              };
  
              CreateRequest req = new CreateRequest
              {
                  Target = appt
              };
  
              CreateResponse resp = (CreateResponse)Service.Execute(req);
  
              if (resp.id.Equals(Guid.Empty))
                  throw new ApplicationException("The system was unable to reserve the Appointment.");
  
              ReserveAppointment(resp.id);
              return resp.id;
          }

  
  

  Friday, January 13, 2017 9:08 AM