Can't get the tables normally using RFC call to BC

Question

SAP Business Connector Developer.
->IDataUtil.getIDataArray function (can't work properly using RFC CALL)( I think it's the source of problem)
I use the SAP Business Connector Developer(4.7) to get data from db2.
and I create a JAVA service in th BC named writeData,
the most important snippet shown below.
  // Get IDataCursor to manipulate pipeline
  IDataCursor idcPipeline = pipeline.getCursor();       
  // If the value is not an IData[], returns null.
  IData[] recordListIn = IDataUtil.getIDataArray( idcPipeline, "ORICONTENT" );
  idcPipeline.first( "CHECKEDDATE" );
  String checkedDate  = (String) idcPipeline.getValue();
  idcPipeline.first( "CPYCOD" );
  String cpycod= (String) idcPipeline.getValue();
   /* if ( recordListIn == null )
          errMsg += "No Input Data";
          recLen=0;
  }else{
        recLen= recordListIn.length;
  try{
     recLen= recordListIn.length;
  catch(Exception ed){
     errMsg += "\r\nExceptionIn: " + ed.getMessage();
     recLen=0;
  In BC, the variable recLen can get the record list length normally, but if i call the function in the SAP,
the system throw an exception, the ed.getMessage() return value NULL.
  I think the problem which the rfc can't work properly is that the method IDataUtil.getIDataArray execute unnormal.
  I have set value to ORICONTENT(record list) in SAP, and it can return the record that i have set to the SAP System,
and in the java service,  I have return another record list creating using the following spippet, It can work normally.
com.wm.app.b2b.server.DBConnection db
        =new com.wm.app.b2b.server.JDBCConnection(driverString,userName,
                userPwd);
          com.wm.util.Values ida= db.execSQL(selectSql);
          idcPipeline.insertAfter("OUTDATAREC", ida );
          db.close();
I have tried some adjustments, but nothing can work.
The reason That I use one jave service instead of standard flow services is I have to transfer data to more than two db2 servers, and I have to keep the consistency.
Attached please find the SAP test page (using se37) and the java service code.
May you kindly help me to solve this problem, I don't know the real reason, and which is very emergent, but i can't changed Priority(If I changed it ,the page is unuseful).
Additional,I have added some code shown below,
idcPipeline.first( "ORICONTENT" );
java.lang.Object curObj = idcPipeline.getValue();
if (curObj == null)
errMsg +=" object is null ";
else{
errMsg +=" object isnt null ";
try{
recordListIn=(IData[])curObj;
} catch(Exception ed){
errMsg += " ExceptionOBj: " + ed.getMessage();
recLen=0;
In BC, everything is ok. but call the function in the sap, Show the following informatin:
Object isnt null
ExceptionOBj: com.wm.util.Table

Answer 1

Hi, Mei Xie
you mentioned 'In BC, everything is ok. but call the function in the sap, Show the following informatin: ....', I think the return value of RFC is null.
have you tried to add a try catch around the RFC call, like following:
try {
  IDataCursor idcPipeline = pipeline.getCursor();
} catch (Exception ...)
I'm not familiar with jave, only worked on C#, but I think try to catch the exception on RFC call is worth doing. Maybe it will descript some information around the problem.
By the way, can you tell me which RFC/BAPI you are calling?
I don't know what 'In BC, everything is ok.' mean. I have no experience on BC, only used dotnet connector. So can you explain how you use BC for me?
thanks