Hey Colin - thanks for the check-list... everything seems to be setup correctly - my settings on the 2080 are as follows: MIDI Settings: ------------------ Device ID Number: 17 Rx Sys Excl: ON Tx Edit Data: OFF Rx GM-ON Msg: ON Utility/Protect: ----------------- Write Operation: OFF Sys Excl Msg: OFF On the AMT-8 I have verified that I am not filtering Sys-Ex messages on this port or any other port for that matter and that the Device ID and ports are set correctly in SD. I agree with you that the probability of a faulty MIDI port is low, but what I am trying to do is not really that complex ( I use SD all the time for patch editing on my K2000 and Virus b), and I have checked and re-checked everything (including trying several different MIDI cables) - and am just seeing absolutely no activity on the "MIDI In" light of the port connected to the 2080. One of the things that really makes me believe it could be a hardware problem is that I tried to do a manual MIDI dump on the 2080 [Utility]--->[f4] for Data Transfer with the following settings: Source -> ALL USER Dest -> MIDI [F6] Execute At this point, one would expect to see a flood of activity on the "MIDI In" port connected to the 2080. I see nothing! I have tried several MIDI cables and even tried different ports on the AMT-8. Luckily, I've been given the go-ahead to blow away all of the User patches so backing up the original User Bank is not really that important, but you know how when something is totally mysterious that it consumes you - even if it is not important to the work you are doing... uhhggg!