Multiple aggregate nodes in calculation view

Hello Gentlemen's,

  I've a requirement, which I want to achieve by using graphical calculation view instead of scripting.

I want to display aggregated value of  filed DMBTR from BSEG table. And the condition here is to filter field BSEG table on BUDAT from selection screen date range say x to y dates for one output column(say Out1) and again BUDAT needs to be filtered for another selection screen date range say y-z for another output column(Say Out2).

I tried using two aggregate nodes, one for each output columns(Out1 and Out2), but got runtime error saying ..."Olap engine, parallel aggregators"..... 

How to achieve this functionality? is it first of all possible to use multiple aggregate nodes inside a CV?

Appreciate your responses..

Thanks,

Akhtar