To all who have experienced system wide disruption in DCC decoder equipped switch machine operations this was my solution to the problem. I had 23 DCC decoder equipped EZ track switches stop working all at once. I could not figure out the problem until Bachmann sent me a new Dynamis system to experiment with. After hooking up the system all my switch machines responded as when they were new. Then, after I entered my fifth locomotive to the new system's register all my switch machines stopped working again. This was the AH! moment for the solution. I removed the fifth locomotive from the register and all my switches worked again. The trouble was not with the Bachman system but in a decoder of an engine I had a sound system installed by a professional. I then reinstalled my old Dynamis system to my railroad and deleted the fifth engine from the rooster on the command station and (BINGO!) all my DCC switches began to operate normally again. My suggestion to you if you have this same problem is to deleted all your decoder equipment from your Dynamis rooster and then reset your handset to (factory default). Then reenter all of your extraneous DCC decoders one at a time until you find the one that is corrupting your switch decoders. Let's all thank Bachmann's service department for helping us work through this problem to a solution. Sincerely John the sailor.