Can't get around this error after adding second dataset...A scope is required for all aggregates used outside of a data region unless the report contains exactly one dataset

Showing live article 3712 of 10045 in channel 6050550
Article Details:

Author:
Language: English
Channel Number: 6050550
Article Number: 3712
Date: August 6, 2014, 7:49 am
URL: http://social.msdn.microsoft.com/Forums/en-US/0712739c-7aed-4a5a-83d1-36ba2bdb2c3f/cant-get-around-this-error-after-adding-second-dataseta-scope-is-required-for-all-aggregates?forum=sqlreportingservices
GUID: http://social.msdn.microsoft.com/Forums/en-US/0712739c-7aed-4a5a-83d1-36ba2bdb2c3f/cant-get-around-this-error-after-adding-second-dataseta-scope-is-required-for-all-aggregates?forum=sqlreportingservices