How to change the logic in the view maintenance and in related programs

Hi Experts,

There is one maintenance view created by joining 3 tables.

we can see the data in this view by clicking table contents button.

the data which is available in this view is wrong.

I have checked the table maintainance generator and related function group and then function fool programs for this view.

I have checked the logic there. It is wrong. I need to change that logic. But system is not allowing to change.

There are user defined forms also in the function pool. there in one include we have written the related logic.

But this logic is not called when checking the data of this view.

Question is how to change that logic. or is there any other way to modify the logic of maintence view programs.

Thanks.