Error at executing RFC in a dynpro project but not at executing in R3

Question

Hi experts,
I have a problem whit my RFC. When I execute it from the R3 there's no problem, I got the result that I expected. But I conect the RFC in a dynpro project and when I executed it I got an error.
Supose that my RFC receives a USER as parameter and returns me a table of type RPM_TT_ORG_UNIT.
The structure of my RFC is something like this
* First I obtain the position of the user
CALL FUNCTION 'HRHAP_SEL_POSITION_OF_PERSON'
* If error
IF SY-SUBRC = 1.
    MOVE: 'E' TO error-msgty,
          '1' TO error-msgno,
          'Postion not found for the user in the UO' TO error-msgv1,
          SY-MSGV1 TO error-msgv2,
          SY-MSGV2 TO error-msgv3,
          SY-MSGV3 TO error-msgv4.
    APPEND error.
  ELSE.
    IF Sy-SUBRC = 2.
      MOVE: 'E' TO error-msgty,
          '2' TO error-msgno,
          'An error not expected has ocurred' TO error-msgv1,
          SY-MSGV1 TO error-msgv2,
          SY-MSGV2 TO error-msgv3,
          SY-MSGV3 TO error-msgv4.
      APPEND error.
  ELSE.
When I executing it from my dynpro project I got the first error 'Postion not found for the user in the UO'. I tought that maybe the USER parameter was not sending correctly, but then I returned the parameter in one of the 4 error messages and turns out that it was sended correctly.
I hope that someone can help me.
P.S Sorry for my english.

Answer 1

Hi Hanif,
Can you explain me a litle more because I put the external breackpoint in my abap function but when I try to execute my dynpro project, ir executes like it was no breakpoint at all.
I was trying with something else ...
First, I create a web service from my function module from the R/3. When I try the web service it works fine and I though "OK, this is the solution" but when I import the module in my dynpro project it turns out that the destination and metadata is incorrect. I put one that its like the "default" when all the webservices are, but this web service is not located at this destination. Then I try to put another destination where the RFC is located to, but it didn't work.
My second option was to execute it directly from a simple Java Class using the libraries of sap com.sap.mw.jco and it works fine, but we thing that this is no the correct way of executing it. My code is something like this:
mConnection = JCO.createClient (<parameters>);
mConnection.connect();
repository = JCO.createRepository("MiRepository", mConnection);
ftemplate = repository.getFunctionTemplate("Z_RFC_FM".toUpperCase());
myFunction = ftemplate.getFunction();
// Here I pass the parameters hardcoded
myFunction.getImportParameterList().setValue("HCURA841", "USUARIO");
myFunction.getImportParameterList().setValue("50001129","ORGUNITID");
mConnection.execute(myFunction);
// Here I get the result
JCO.Table table = myFunction.getTableParameterList().getTable("SUP_JERARQUICO");
int rows = tabla.getNumRows();
System.out.println("Rows:" + rows);
for(int i=0; i<rows; i++){
      // Get the result on the column ONAME
      System.out.println(tabla.getValue("ONAME"));
      tabla.nextRow();
I don't know if it could be also a proble o permission of the user.