Date variable selection - default

Hi Gurus,

Our Webi report is based on a BW Bex query. The date prompt in the BO report is based from the variable from the Bex query.

On whichever day when I try to run the webi report in the prompt  I want to see the previous day by default in the prompt selection. How can this be done?

i.e. for the selection it should show the previous day. i.e. instead of 06/02/2015 it should show previous day(in our case it should show 19/02/2015)

In webi its difficult, I am exploring the possibility of doing it in the Bex any way.

Regards...