That means you don't have the required track in your database. Open CMP and find the route, right click on the route and select 'view dependencies'. Then you will have to try and track down all the missing ones, some may be on the DLS and some may not.
Having same problem different layout and the track is installed and error free.
AH I just fix by deleting clovis2 route and the backup then re-installing.
Don't know why but it worked.
Thank you so much Bill69. CMP shows Kuid's for 25 unidentified items. However, they are not on the DLC. They appear to be a series of track and switch items as the kuids are similar. Does anyone know what type of track was used for this layout?