throw CX_SY_ITAB_DUPLICATE_KEY

[Lars Hvam]

valid code,

TYPES: BEGIN OF ty_new_data,
         letter TYPE c LENGTH 1,
         number TYPE i,
       END OF ty_new_data.
DATA tab TYPE SORTED TABLE OF ty_new_data WITH UNIQUE KEY letter.
DATA empty LIKE LINE OF tab.
INSERT empty INTO TABLE tab.
ASSERT sy-subrc = 0.
INSERT empty INTO TABLE tab.
ASSERT sy-subrc = 4.
ASSERT lines( tab ) = 1.

throws error,

TYPES: BEGIN OF ty_new_data,
         letter TYPE c LENGTH 1,
         number TYPE i,
       END OF ty_new_data.
DATA tab TYPE SORTED TABLE OF ty_new_data WITH UNIQUE KEY letter.
DATA empty LIKE LINE OF tab.
tab = VALUE #( ( letter = '' ) ( letter = '' ) ).

[Lars Hvam]

hmm, this looks like a downport problem instead