Neither option is possible because this layout loop is about 200 feet long with alternate power districts as described. Also, we have invested in DCS (and a TMCC interface) now to the point where WiFi won't be possible for some time (not including the requirement for many of us to purchase new phones as I understand that requirement). If this is a software problem who positively identifies and resolves this issues in what time frame? As I stated DCS works over the entire layout; therefore, for now we can set the variable channels to "fixed" and operate conventional engines from the transformers on that loop of the layout when necessary. Thanks again.