\label{Ambiguous_Reference} This error message has come up when a user tried to look at a resource in the publication space, while the viewer is not currently in a class. LON-CAPA's resources are rendered very dynamically, reacting to the class the viewer is in, where in a sequence they are, whether they've finished other problems correctly, how many times they've tried a problem... all of these things are stored as part of the information a course keeps track of about a student. When viewing resources that depend on this information to determine how to render them correctly while not actually in a course, LON-CAPA cannot really determine how to correctly render the resource. Rather than simply refuse to show you the resource, LON-CAPA will try to make reasonable guesses about how you want to view the resource. In order to warn you that this is not a definitive rendering of the resource, LON-CAPA displays the warning ``Could not handle ambiguous resource reference'' to warn you that it's guessing about the resource. For the same reasons as LON-CAPA cannot ``correctly'' determine how to render the resource, you will not be able to correctly interact with a resource viewed with an ambiguous reference. LON-CAPA logs a student's interaction with a resource in the course information, so if you are not viewing the resource from inside a course, LON-CAPA has nowhere to store information about whether or not you've gotten the problem correct, how many tried you should be allowed, etc, so all input to the problem will simply be discarded. To test the problem, use your \textbf{Authoring Space}.