BDC Session Saves Data Only in Foreground

Question

I have created a bdc program to create an SM35 session of CA02.  The wierd thing is that the session will run in background with no errors, but the data is not updated.  If I run the session in foreground the data is updated.  Have I overlooked something simple?

Answer 1

To see what is going on, I commented out the save at the end to force it to error out.  If I run the session in foreground the data is changed.  If I run it in display errors only mode, the data is not changed.  So it seems not to have anything to do with the save at the end.  Perhaps it is now appropriate to post some of the code.
After the data file is uploaded into the itab and the bdc group has been created, for each routing group I do the following:
  PERFORM dynpro USING:
* ***   Initial Screen   ***
      'X'   'SAPLCPDI'       '1010',
      ' '   'RC271-PLNNR'    gk_rec-groupnum,
      ' '   'BDC_OKCODE'     '/00',
* *** Header Overview  ***
      'X'   'SAPLCPDI'       '1200',
      ' '   'BDC_OKCODE'     'MTUE'.     "open material allocation screen
Then for each material allocation the data file says to delete:
  PERFORM dynpro USING:
* *** Material Allocation ***
      'X'   'SAPLCZDI'         '1010',
      ' '   'RC27X-ENTRY_ACT'  gv_entry,   "gv_entry holds row number to delete
      ' '   'BDC_OKCODE'       'ENT1',       "position button
      'X'   'SAPLCZDI'         '1010',
      ' '   'BDC_CURSOR'       'MAPL-MATNR(01)',  "place cursor on the line to delete
      ' '   'BDC_OKCODE'       'LOE',                      "delete line
      'X'   'SAPLSPO1'         '0100',
      ' '   'BDC_OKCODE'       'YES'.                      "confirm dialog
then at the end of the session:
  PERFORM dynpro USING:
        'X'   'SAPLCZDI'       '1010',
        ' '   'BDC_OKCODE'     'BACK', "leave material allocation screen
        'X'   'SAPLCPDI'       '1200',
        ' '   'BDC_OKCODE'     'BU'.  "save
Then, I insert into the bdc session using tcode ca02.  All this given the following subroutine:
FORM dynpro USING p_dynbegin TYPE any p_name TYPE any p_value TYPE any.
  CLEAR gk_bdc_tab.
  IF p_dynbegin = 'X'.
    MOVE:  p_name  TO gk_bdc_tab-program,
           p_value TO gk_bdc_tab-dynpro,
           'X'   TO gk_bdc_tab-dynbegin.
  ELSE.
    MOVE:  p_name  TO gk_bdc_tab-fnam,
           p_value TO gk_bdc_tab-fval.
  ENDIF.
  APPEND gk_bdc_tab TO gt_bdc_tab.
ENDFORM.
It seems that the cursor isn't specifying the line to delete when run in background.