Tableau report on SAP BEX query / customer exit variable

Hi Experts,

Need help.

I am trying to create tableau report on top of BEX query.

In the BEX query there is a variable which was defined with customer exit (ABAP code) which is pulling calendar date automatically. When we execute BEX query the date is populating automatically.

When I am connecting to bex using tableau the date is not populating automatically in tableau.

Is there is any limitation or am I missing something.

PLease suggest.

Thanks,

rajendra