Thanks for quickly response, It's didn't solve my problem, i was already setting the processing mode as local in my report viewer application. I've tried both "Bind data source at client side" and "Bind data source in Web API Controller" using ASP.NET MVC not ASP.NET Web Form, still this error occurring, How i can solve this error? It's been 2 days and i'm stuck with this I'm unable to help myself :(