The tracks are not connected. I got that error on an O scale layout at two locations. At one the track was just not connected. At the other the tracks overlapped.
Delete and relay the track at the problem location.
I tried to sell my two cents worth, but no one would give me a plug nickel for it.
I don't have a leg to stand on.
Do any of you who use Kato unitrack also use Xtrakcad for your layout design planning. I have finished my Kato unitrack layout in Xtrakcad; however, when I run my locomotives that I made in the Xtrakcad programs on the Kato unitrack in Xtrakcad, I receive the message, "no room" on one of the turnouts when I try to run the locomotive through a single crossover to the corresponding double track mainline. Anybody know why this happens and know of a solution? I would appreciate any help.