Unable to select Aggregate

Dear Guru's,

When i was trying to check if my query is hitting the aggregate or not, i noticed this below message :

RSRT --> Execute & Debug --> SELECT  ( Display Aggregates found & Select Aggregate )

Not possibe because --- ____Characteristic 0FISCVARNT is compressed but is not in the aggregate/query

                                   ____Characteristic 0PLANT is compressed but is not in the aggregate/query

I found that all the characteristics in the query are found in aggregates ..

please see that the Selection check box is disabled.

Kindly suggest on how this can be fixed.

Thanks & Regards,

Sudhir.