A SOAP call to the SBM Event Manager to trigger an orchestration may get an error of "The endpoint reference (EPR) for the Operation not found is /eventmanager/services/ALFEventManagerDocLit and the WSA Action = null. If this EPR was previously reachable, please contact the server administrator."  This could be caused by missing headers such as SOAPAction that are required for the call that were added in newer versions of SBM.  The call should work once all required headers are added.