Thanks Thomas
I do have a try/catch around my code where I can log any errors in the code that builds the query string
The concept works perfectly - the error being caught is the query string to the search property of a view panel which is not understandable. The error page displays when it should (and requestScope.error is a VERY useful thing to display!)
It's one of those little things that doesn;t quite work in XPiNC as it does in a browser. It is annoying to say the least!!!!
Mike