Error in value returned from BAPI

Question

Hi,
         I have created a RFC model for the BAPI. This has many nodes as context. In my scenario, I have like this.
<b>Node A
  Node B ( Model node)
  Var C  (Model variable)</b>
When I execute the BAPI, I get size for Node A as 1 but node B as zero. But this is not the case if I execute the BAPI directly from SAP GUI. I get output in both nodes with same inputs. I couldn't trace the problem why I don't get any value in other node. It returns null pointer exception. Kindly help me out.
Regards,
Harini S

Answer 1

Hi,
   This is the snippet.     
String stLow = wdContext.nodeDl_Head().currentDl_HeadElement().getKunnr();
wdContext.nodeOutputCusContact().invalidate();
wdContext.nodeContactaddressdata().invalidate();
// Execute BAPI in getCustomerContactList method
wdThis.wdGetCO_GenerateappController().getCustomerContactList(stLow);
wdComponentAPI.getMessageManager().reportSuccess("Cont:"+ wdContext.nodeContactaddressdata().size());
wdComponentAPI.getMessageManager().reportSuccess("Out:"+ wdContext.nodeOutputCusContact().size());
The BAPI gets executed successfully since we r getting values for other nodes in the same main node. Only one particular node gives this problem.
wdContext.nodeContactaddressdata().size() returns 0. Any get on that node causes null pointer exception. Please guide me.
Regards,
Harini S