We are building a WebFocus reporting application accessing data in UDB V7. I would like to trap all 30x, 40x and 50x http errors and send to a neutralized, custom error page(s). Have been searching the IBI site, but have not come up with anything yet. Anyone aware of a configuration setting or other method to accomplish this with WebFocus 4.3

You can create custom http error pages
most web servers allow you to replace the standard http messages.
In a J2EE web application this can be accomplished through a combination jsp and web.xml
the following is an example of webfocus 5.2 traps
http 500 errors

500
/worp/jsp/WORP_ErrorPage.jsp