need help regarding report viewer

Exception :

" The definition of the report 'Main Report' is invalid. "

 

I am getting this exception while rendering the report in windows application. I have checked all the three files

( Microsoft.ReportViewer.Common.dll
Microsoft.ReportViewer.ProcessingObjectModel.dll
Microsoft.ReportViewer.WebForms.dll
)

 

version and it has no problem.

Where can I get something to read about this exception. I searched on net but I found all the threads related to ASP. I am using it in my windows application.

 

Thanks for your reply.