Re: I have a parameter as listbox with 3 values and 2 radio buttons in my selection screen .Now i want to disable one of the radio button as soon as choose a value from the listbox without pressing the execute button on application toolbar.

Hi Siddarth,

I'm sorry but you won't be able to override the mandatory Parameters/Select-Options. In such a case where you want a dynamic Screen control having mandatory fields I usually use the AT SELECTION-SCREEN. Event to make sure the mandatory fields are populated instead of making them OBLIGATORY. You can check SY_UCOMM to make sure the error message does not come up if you just changed the selected entry of your listbox.

Regards

Oliver