cost center group select option

here is my code:

declaration of select option.

SELECT-OPTIONS s_khinr FOR csks_itab_group-khinr no intervals.

at selection-screen on value-request for s_khinr-low.

at selection-screen on value-request for s_khinr-high.

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• Initialization

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initialization.

perform build_group_option.

delete adjacent duplicates from csks_itab_group comparing all fields.

at initialization fir build my internal table called csks_itab_group, which gets the names for the coster center groups then I delect any duplicates.

still does work, any ideas.

thanks