brundlefly
Bristol_Jonesey
Kylotan
brundlefly
Kylotan
WE CURRENTLY CANNOT USE THE DRUM MAPS AT ALL.
Shouting something does not make it true. If you reload the map, or reset the output of just one note number, the map will start working. It's only on initial load of a project with an existing map that they don't work. Yes, this makes switching projects frequently kind of a pain, but it's far from unusable.
So, you found a workaround, well done. This is hardly obvious and I wouldn't have found it myself. At the point where I posted, as far as I was concerned, this was true - the drum maps were not working, at all, in any project.
I'm afraid this isn't a workaround, at least it doesn't work for me.
I've tried with 3 different projects so far with zero success.
Sorry, I've been busy, and didn't have a chance to check back in. All I know is that when I saw the port/channel was blank at the bottom of the map, my first thought was to reset output ports, and I started by just doing one. When I saw port/channel was repopulated by doing that, I tested playback and found the whole map was working again. I tried one other project, and it worked there as well, so I'm not sure why it didn't work for you, but I would guess something else is going on in addition to the port assignment issue in your case.
I didn't realize no one had yet posted any workaround at the time or I would have been more gentle in my response. 
No need for any sort of apology. The first time I opened up a map which wasn't working, one of the keys had been reset from BFD2 to Rapture. Resetting the output port to BFD cause the map to work normally.
I then saved the project, closed it to do something else. When I reopened it, the port had gone back to Rapture, but setting it back to BFD this time had no effect. I could trigger notes from within the map but not by running the transport.
That's the extent of my analysis so far, but I will carry on experimenting and see what happens