Hello, if I use \in, \about, \at or anything else that generates a cross-reference, and that reference happens to be invalid (typo or whatever), it just prints out "nothing". Is there a way to have context throw an error if a reference is invalid? (That probably would only make sense in the second pass of context, since the first pass has to collect the references first.) If context can't do it by itself, I'll probably just grep for "unknown reference" and use that, but if context could do it by itself, it would be nice for automated builds (I actually have my current ConTeXt project in a Continous Integration system, so anything that leads to a wrong result should throw an error there.) -- Best Regards, Andreas