While reading Laurence Timm's blog today (err, catching up with it...), I noticed his spot-on entry about BizTalk messaging errors, and how frustrating it can be when the error messages that BizTalk produces don't match up with what you are seeing.  It's like flying an airplane into a cloud bank when you are only VFR trained...  your body tells you one thing, but the instruments tell you something else.  And, if you can't get the two reconciled quickly, you can find yourself quickly panicking and possibly corkscrewing into the ground. Things go bad very quickly when you see that the right schema is in the BizTalk Explorer, but HAT still says that it has no destination for your message, so it can't be picked up.  Thanks, Laurence.