Hi ALL How to keep field in input mode even if error is fired in the PAI

Question

Hi all my requirement is like this
Here in one screen am using the table  control now in the table control user is providing data .
while user will press the save button after providing the respective data then it should check one validation by looping on the table control and adding all data bringing into an internal table which is working absolutely fine . the validation is the (result added data is validated against the data which is there in the database) .
if validation fails then user gets one error message but at that time all fields are going to display mode .
but user wants to be present in the screen and rectify the data .
PROCESS BEFORE OUTPUT.
  MODULE sub_get_fs_data_0111.
  LOOP AT it_fs INTO wa_fs WITH CONTROL file_system_tab.
    MODULE sub_populate_fs_screen.
  ENDLOOP.
PROCESS AFTER INPUT.
  MODULE user_command_0111.
  LOOP AT it_fs.
    MODULE sub_read_fs_data.
  ENDLOOP.
MODULE user_command_0111 INPUT.
  CASE sy-ucomm.
    WHEN 'SAVE'.
      PERFORM sub_compute_sum.
      PERFORM sub_upd_fs_tbl_0111.
  ENDCASE.
ENDMODULE.
FORM sub_compute_sum .
data : l_error type p decimals 2.
  CLEAR: g_storagesansum,
         g_storagelocsum.
  LOOP AT it_fs INTO l_fs.
    ADD l_fs-zz_storage_san TO g_storagesansum.
    ADD l_fs-zz_storage_loc TO g_storagelocsum.
    l_sansum = l_sansum.
    l_locsum = afvu-zz_aodfield75.
    IF l_sansum < g_storagesansum.
      l_error = l_fs-zz_storage_san.
      EXIT.
    ENDIF.
    IF l_locsum < g_storagelocsum.
      EXIT.
    ENDIF.
  ENDLOOP.
  l_tempsum = l_sansum - g_storagesansum.
  IF l_tempsum GE 0.
    g_availablesan = l_tempsum.
  ENDIF.
  l_tempsum = l_locsum - g_storagelocsum.
  IF l_tempsum GE 0.
    g_availableloc = l_tempsum.
  ENDIF.
  IF l_sansum < g_storagesansum.
    IF g_onetimeflagsan = ''.
      g_onetimeflagsan = 'X'.
       g_storagesansum =  g_storagesansum - l_error. " testing
       leave to screen 0.
      MESSAGE E021. "Total storage exceeds total SAN available
    ELSE.
      g_onetimeflagsan = ''.
      l_tempsum = l_sansum - g_storagesansum.
      IF l_tempsum GE 0.
        g_availablesan = l_tempsum.
      ENDIF.
    ENDIF.
  ENDIF.
ENDFORM.
please answer if there is any way to do this

Answer 1

Thanks
Yeah That can be done but i was looking at some Solutions which generally is done In sap screens
like in the standard transactions if we will give anything wrong value then only that row and that particular field will be open for the input in the table control
Cant we do it ...
Before submitting this i already checked all the forums regarding table controls
There were some regarding how to apply chain and end chain but this is a tricky situation
none carries this type of problem so i posted this would anybody  answer this qs?