While I was debugging in Visual Studio 2010, I come across this error when working with an aspx page that has a report viewer control. This only happens with IE. My report displays, but as soon as I click a parameter drop down that has multiple selections, the debugger throws the following error:
Now this exception in no way prevents my report from running. I am not even sure what the error is all about. If I publish my web site and run it from the domain, I would never know the error was being thrown.