Dump in calling the BAPI_PO_GETDETAIL

Question

Hi
  I am getting a dump while CALLING  the BAPI_PO_GETDETAIL..
The dump as follows:
In the function module interface, you can specify only
fields of a specific type and length under "PO_HEADER".
Although the currently specified field
"IT_HEADER" is the correct type, its length is incorrect.
Here is my declaration.
TYPES : BEGIN OF TY_HEADER.
INCLUDE STRUCTURE BAPIEKKOL.
TYPES : END OF TY_HEADER.
CALL FUNCTION 'BAPI_PO_GETDETAIL'
  EXPORTING
    PURCHASEORDER                    = EBELN
    ITEMS                            = 'X'
  ACCOUNT_ASSIGNMENT               = ' '
  SCHEDULES                        = ' '
  HISTORY                          = ' '
  ITEM_TEXTS                       = ' '
  HEADER_TEXTS                     = ' '
  SERVICES                         = ' '
  CONFIRMATIONS                    = ' '
  SERVICE_TEXTS                    = ' '
  EXTENSIONS                       = ' '
IMPORTING
   PO_HEADER                         = IT_HEADER
  PO_ADDRESS                       =
TABLES
  PO_HEADER_TEXTS                  =
   PO_ITEMS                          = IT_ITEM
  PO_ITEM_ACCOUNT_ASSIGNMENT       =
  PO_ITEM_SCHEDULES                =
  PO_ITEM_CONFIRMATIONS            =
  PO_ITEM_TEXTS                    =
  PO_ITEM_HISTORY                  =
  PO_ITEM_HISTORY_TOTALS           =
  PO_ITEM_LIMITS                   =
  PO_ITEM_CONTRACT_LIMITS          =
  PO_ITEM_SERVICES                 =
  PO_ITEM_SRV_ACCASS_VALUES        =
  RETURN                           =
  PO_SERVICES_TEXTS                =
  EXTENSIONOUT                     =
  NFMETALLITMS                     =
Its not showing any syntax error while executing it. But while runninghte program i am getting the above said dump.
Thanks in advance
Arun

Answer 1

Hello Arun
Once again the most important information to answer your question is missing:
Where is the definition of IT_HEADER?
I assume you are still using itabs with header lines (which are outdated for almost a decade).
Why not using a clean and straightforward approach?
DATA:
  ls_po     TYPE bapiekkol,
  lt_po      TYPE STANDARD TABLE OF bapiekkol.
" Use LS_PO to return the PO header data.
Regards
  Uwe