SAP Message CACSRCP109 - Error while determining ELT document for document &1

Diagnosis An error was reported by the calling function module while determining adocument of type A (entitlement and liability transfer). System Response Processing of the worklist is canceled. Procedure Check whether the function module call <(> <<)>APPL>_ELTDOC_FOR_DOC_GETor _ELTDOC_CANCEL was made with the correct document data.