message invalidWorkGroupFault
parts 
invalidWorkGroupFault
element ex:InvalidWorkGroupFault
used by 
Operation endGroup in PortType WorkGroupManagementService
Operation scheduleWorkItem in PortType WorkItemSchedulerService
Operation scheduleWorkItemWithWorkModel in PortType WorkItemSchedulerService
source  
<wsdl:message name="invalidWorkGroupFault">
  <wsdl:part name="invalidWorkGroupFault" element="ex:InvalidWorkGroupFault"/>
</wsdl:message>

WSDL documentation generated by XMLSpy WSDL Editor http://www.altova.com/xmlspy