This topic has been covered in several other threads already. The problem is that award searches are now defaulting to flexible dates (even if you select exact dates), and for some partner-only destinations, a flexible dates search will often simply error out. The solution is to first do a revenue search for exact dates, and then click the "Miles" link at the top of flight listings. This will redo the search as an exact dates award search which will not bomb out. This is the only mechanism I have found for doing an exact dates award search. Unfortunately, since flexible dates searches bomb out, you are stuck with doing day-by-day exact searches.