ASP.NET 2.0 ReportViewer :: Failed to enable constraints

I'm using the ASP.NET 2.0 ReportViewer in local mode for the first time (and it ROX). Here are two excellent tutorials:

• ASP.NET 2.0 ReportViewer in Local Mode - this one is great for getting setup. You need to run reportviewer.exe file on your web server. You can get the reportviewer.exe here.
• Drill Down Reports with ReportViewer ASP.NET 2.0 - this one is also excellent for demonstrating a 3 level drill down report.

After you get everything set up and are running the tutorials, you may get this error message:

An error has occurred during report processing.
Exception has been thrown by the target of an invocation.
Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.

You can go here for the solution to this.

One last piece of code that will save you from a migraine :)

this.ReportViewer1.LocalReport.Refresh();

Good Luck!

-Eurlist.thesol.com