bpel에 목록에 추가

Question

개체 목록에 요소를 추가하려하지만 NullpointerException이 발생했습니다. 누군가 나를 도울 수 있습니까?

      <if name="If1"> 
           <condition>1 = $addFlightCalled</condition> 
           <assign name="Assign"> <----- THIS IS WHERE I GET A NULLPOINTER 
            <extensionAssignOperation> 
             <bpelx:append> 
              <bpelx:from>$tempFlight</bpelx:from> 
              <bpelx:to>$Itenerary/flightBookings</bpelx:to> 
             </bpelx:append> 
            </extensionAssignOperation> 
           </assign> 
           <else> 
            <assign name="Assign3"> 
             <copy> 
              <from variable="tempFlight"/> 
              <to>$Itenerary/flightBookings/FlightBookings</to> 
             </copy> 
            </assign> 
           </else> 
          </if> 
... 

누군가 나를 도울 수 있습니까?

Answer 1

$ Itenerary/NS0 : 항공편/NS0 : FlightBookings [$ ForEach1Counter]/NS0 : bookingNumber $ CancelFlightIn.parameters/arg0를 $ Itenerary/NS0 : 항공편/NS0 : FlightBookings [$ ForEach1Counter ]/ns0 : 가격 $ CancelFlightIn.parameters/arg1