I am receiving the attached error when I have a RadGrid and RadMap attached to the same RadClientDataSource. The error occurs by a postback on a Rad drop down. If I bind the two to different RadClientDataSource the error goes away. Unfortunately I would like to keep them bound to the same single RadClientDataSource as I have found when I filter the list of customers (with Lat/Long) the RadMap filters aswell, so was a 'feature' I want to keep. Any thoughts on how I supress this message ?