abap logic.

hi,

i am writing some logic in the start routine of the update rule to a cube from ODS.inside the logic i am using 3 diff. custom function modules which fetch data from 3 diff. queries and populate data in 3 internal tables. But my problem is when i use these 3 function modules, only the first function module populates the data in the first internal table and the rest 2 are not populating data in internal tables but when executed individually, they are working fine.I have to obtain all the data before looping at data package , so i used these 3 function modules serially outside the loop and trying to fetch data and store in internal tables for further processing.

But, only one fm is working .

Any help is appreciated.

Thanks in advance.