Querying on aggregates created on Virtual Cube

Hello,

I have implemented a virtual InfoProvider with Services.When I create queries directly on the Virtual Infoprovider the query runs fine and I see the report.

As per my requirement I create an aggregate on the Virtual Infoprovider .Then I define a query on the aggregate .But when I execute this query I get the following errors :

• Error reading the data of InfoProvider AG4

• An exception with the type CX_SY_REF_IS_INITIAL occurred, but was neither handled locally, nor declared in a RAISING clause

• Dereferencing of the NULL reference.

Would appreciate any assistance on this topic.

Thanks

Priyadarshi