EVSUM Not Found

Hi Experts ,

I am trying to create expansion containing several accounts that will include a SUM total of all accounts.

A special instruction "EVSUM" can be placed in the data range portion of a before-or-after range .

When the expansion is performed this keyword will be automatically truned into an Excel formula that calculates the sum of the members of the related expansion.BPC doesn't recognize EVSUM function,Please suggest.

Regards

VYVadan