Transformation between DSO's: Unit is lost

- internal code TWAN20090414 -

We have a strange problem with datatransfer between 2 DSO's. A -> B

In DSO A we have records with amount and quantity. DSO B is set to add the records per order number. Strangely for one single order (out of thousands) the unit remains empty while all source records have a unit ST (which is Dutch for PC or pieces). Any suggestions how to solve this problem?

Now I created a transformation over the second DSO to its self (B -> B) to find all records with empty units. For each record that I find the unit is filled with the unit found in the source DSO. Now something even stranger happens. When we look in the DSO the unit is now PC and not ST. So it uses the english name instead of the Dutch. And I copy the value of the unit-field from the source record so I don't understand why its displayed differently. Any suggestions on the cause of this problem are highly appreciated. The code of my transformation is shown below...

*-----------------------------------------------------------------------

*==
* Filter records with filled unit and currency.

  DATA:
    qty LIKE DATA_PACKAGE-quantity,
    unt LIKE DATA_PACKAGE-unit,
    val LIKE DATA_PACKAGE-deb_cre_lc,
    cur LIKE DATA_PACKAGE-loc_currcy.

  LOOP AT DATA_PACKAGE.

    qty = DATA_PACKAGE-quantity.
    unt = DATA_PACKAGE-unit.
    val = DATA_PACKAGE-deb_cre_lc.
    cur = DATA_PACKAGE-loc_currcy.

    IF  qty IS NOT INITIAL
    AND unt IS NOT INITIAL
    AND val IS NOT INITIAL
    AND cur IS NOT INITIAL.
      DELETE DATA_PACKAGE.
      CONTINUE.
    ENDIF.
    IF  qty IS INITIAL
    AND unt IS INITIAL
    AND val IS NOT INITIAL
    AND cur IS NOT INITIAL.
      DELETE DATA_PACKAGE.
      CONTINUE.
    ENDIF.
    IF  qty IS NOT INITIAL
    AND unt IS NOT INITIAL
    AND val IS INITIAL
    AND cur IS INITIAL.
      DELETE DATA_PACKAGE.
      CONTINUE.
    ENDIF.
    IF  qty IS INITIAL
    AND unt IS INITIAL
    AND val IS INITIAL
    AND cur IS INITIAL.
      DELETE DATA_PACKAGE.
      CONTINUE.
    ENDIF.
    IF  unt IS NOT INITIAL
    AND cur IS NOT INITIAL.
      DELETE DATA_PACKAGE.
      CONTINUE.
    ENDIF.
  ENDLOOP.

*==
* Records that remain have an empty UNIT or CURR

  DATA:
    my_fiscper  TYPE /bi0/oifiscper,
    my_fiscper3 TYPE /bi0/oifiscper3,
    my_fiscyr   TYPE /bi0/oifiscyear,
    my_unit     TYPE /bi0/oiunit,
    my_curr     TYPE /bi0/oicurrency.

  FIELD-SYMBOLS:
    <ds> LIKE DATA_PACKAGE.

  LOOP AT DATA_PACKAGE ASSIGNING <ds>.

    CONCATENATE <ds>-fiscyear <ds>-fiscper3
      INTO my_fiscper.

    SELECT SINGLE unit loc_currcy FROM /bic/at031002000
      INTO (my_unit,my_curr)
      WHERE comp_code  = <ds>-comp_code
      AND   fiscper    = my_fiscper
      AND   fiscvarnt  = <ds>-fiscvarnt
      AND   gl_account = <ds>-gl_account
      AND   chrt_accts = <ds>-chrt_accts
      AND   ac_doc_typ = <ds>-ac_doc_typ.

    <ds>-unit       = my_unit.
    <ds>-loc_currcy = my_curr.

  ENDLOOP.

*-----------------------------------------------------------------------