Remove external library from help search in SandCastle

I have a project that uses MVC and NHibernate. I don't want to add documentation for these libraries when creating documentation for my project. The problem is that outputting from a class in these libraries gives a lot of warnings and makes it difficult to see more serious warnings (like lack of documentation, incorrect references, etc.).

I've already disabled warning 1591 for parts of my code, but that doesn't help. I removed Inherited base class members

from Visibility

in config but it doesn't help.

Is there a way to remove searching for these components?

Actual errors look like this:

C: \ Program Files (x86) \ EWSoftware \ Sandcastle Help File Builder \ SandcastleHelpFileBuilder.targets (40,3): warning: BuildAssembler: warning: ResolveReferenceLinksComponent: [M: MYSESSIONFACTORY.Close] Unknown reference target 'M: NHaibernate.ISctoryFctory .Close. [C: \ PROJECTPATH ​​\ Projectname \ PROJECTNAME.Documentation \ Help \ Working \ BuildReferenceTopics.proj]