If you want to debug your custom pipeline component you can make use of the Pipeline.exe utility to do this: Set the breakpoint in your Custom Pipeline Component code in Visual Studio. On the properties page of the project containing your Custom Pipeline select the Debug tab. Set the “Start Action” property to "Start external program" and then type or browse to: {Installation Location}\Microsoft BizTalk Server 2010\SDK\Utilities\Pipeline... For the "Start Options > Command line ......