Try the flag in your single source recipe to not search un-referenced topics.
Is it out of the question to upgrade your RoboHelp?
I ask because I don't believe the option Jeff menitoned is available to you in version 6. This version is getting long in the tooth as it was released in 2007. In the recent versions we now have at least two different ways to make content hidden from search.
Is the topic in question actually referenced in other ways? Or is your goal to just make it unfindable?
More info is needed in order to help you plan a course of action.
Sorry Rick – kinda fuzzed out on the version there
LOL, easy to do, Jeff. Lord knows I've done it enough times myself!
Hope your day is a good one!