does not sort table maintanance generator even with EVENTS or PBO

Hi Good day,

i have created a custom table with 2 fields

ex : number and name

i have created table maintanance generator and i have written logic in PBO for sort but does not work.

COPY_EXTRACT[] = extract[].

SORT COPY_EXTRACT[] BY AFNAM ASCENDING.

EXTRACT[] = COPY_EXTRACT[].

can anyone help me out.

thankyou,

jacob.