user Function Macros not populating values in Planning Book

Hi,

i have created a User Function Macro in /sapapo/advm and i am calling a Z Function Module to calculate some value.

when i generate macro and test in planning book, it is not returning and values .

i debugged my Custom FM and it is returning correct values .

these values are correctly populated in GT_TAB but somewhere in between, it is getting deleted.

i am not sure of the reason for this deletion.

appreciate all your assitance in this regard..

Thanks

Gaurav