Data entry validations for IDocs

FUNCTION ZSD_IDOC_INPUT_PICKING.
*"----------------------------------------------------------------------
*"*"Globale Schnittstelle:
*"  IMPORTING
*"     VALUE(INPUT_METHOD) LIKE  BDWFAP_PAR-INPUTMETHD
*"     VALUE(MASS_PROCESSING) LIKE  BDWFAP_PAR-MASS_PROC
*"  EXPORTING
*"     VALUE(WORKFLOW_RESULT) LIKE  BDWFAP_PAR-RESULT
*"     VALUE(APPLICATION_VARIABLE) LIKE  BDWFAP_PAR-APPL_VAR
*"     VALUE(IN_UPDATE_TASK) LIKE  BDWFAP_PAR-UPDATETASK
*"     VALUE(CALL_TRANSACTION_DONE) LIKE  BDWFAP_PAR-CALLTRANS
*"  TABLES
*"      IDOC_CONTRL STRUCTURE  EDIDC
*"      IDOC_DATA STRUCTURE  EDIDD
*"      IDOC_STATUS STRUCTURE  BDIDOCSTAT
*"      RETURN_VARIABLES STRUCTURE  BDWFRETVAR
*"      SERIALIZATION_INFO STRUCTURE  BDI_SER OPTIONAL
*"  EXCEPTIONS
*"      WRONG_FUNCTION_CALLED
*"      OTHERS
*"----------------------------------------------------------------------
Data: myerror.
Clear myerror.
Loop at idoc_data.
        **** verify the segments
  if not OK.
    Myerror = 'X'.
..    Fill IDOC_status with the error message and set IDOC_STATUS-STATUS =
51 !
    Exit.
  Endif.
Endloop.

If myerror eq space.
CALL FUNCTION 'ZSD_IDOC_INPUT_PICKING'
  IMPORTING
     INPUT_METHOD = INPUT_METHOD
     MASS_PROCESSING = MASS_PROCESSING
           .......
..
Endif.

Endfunction.

****

In order to use it with standard inbound processing you need to execute:

BD51 and add the function to the list of allowed inbound functions
WE42 create a new processing code for inbound to use in partner profiles
WE20