Navigator7 - Invalid URLs

Hello guys,

I’d like to attach a listener so my Navigator7 context, which tells me, if an URL entered by a user is valid or not.
The Navigator7 framework already catches wrongly entered urls but I’d like to send the user to some kind of error page.

Is there a way how to do this?


Page listens to


but the user entered


and he should be send to a 404Page listening to