TRY.
DATA(messsage_handler) = NEW cl_hrpa_message_list( ).
cl_hrpa_masterdata_enq_deq=>enqueue_by_pernr( tclas = cl_hrpa_tclas=>tclas_employee
pernr = 1
message_handler = messsage_handler ).
cl_hrpa_masterdata_enq_deq=>dequeue_by_pernr( tclas = cl_hrpa_tclas=>tclas_employee
pernr = 1 ).
CATCH cx_hrpa_violated_assertion.
ENDTRY.