I have two TIU's both set to Super TIU. I've had this layout for 8 years. I had a car come off on a track being controlled by TIU #2. Then things went crazy. After struggling to figure out why I couldn't move engines I determined that both TIU's were now considering themselves as TIU #1. I now have gotten them back to TIU #! and TIU#2. Problem is that I can only add engines on TIU #1 tracks. Once I add them to the hand held on TIU #1 tracks I can put them on TIU #2 tracks and operate them. I even then tried deleting them while on TIU #2 track and then re-adding them on TIU #2 track and all I get is no engine to add. I've rechecked the blinks on the power lights on the TIU's and they are one for #1 and two for #2.Any thoughts?
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