How to Show and Hide Compiler Links
When you compile a map, BizTalk Mapper creates additional links, known as compiler links to account for all linking needed in the map. Some of these links are only implied by the links you created. When you compile, or test, a map, the final line in the Visual Studio Output window allows you to show or hide these additional compiler links in the main window. By default, the compiler links appear as red dashed lines.
To show or hide compiler links
In Solution Explorer, right-click the map whose complier links you want to view, and then click Test Map.
In the Visual Studio Error List window, scroll to the end and double-click the line that says Double-click here to show/Hide compiler links.
To change the display state of compiler links from shown to hidden, or from hidden to shown, just double-click that line again.
Note
When you build/rebuild a BizTalk project or solution containing one or more maps, the message Double-click here to show/Hide compiler links is displayed in the Error List window of Visual Studio for all the maps in the project or solution.
To test a map, you must configure the properties for the input and output instances. For more information about how to configure these properties, see How to Configure Map Validation and Test Parameters.