If you have not already done so, install the DLC "Additional TANE Assets for TRS19".
To install this content, select Content Store from the TRS19 Launcher window. In the Trainz Content screen that will appear type TANE in the text box just to the left of the Store "shopping bag" icon and hit the enter key. In the filtered list of DLC assets you will see "Additional TANE Assets for TRS19". Click the Install button next to this item.
After the install, perform a Database Repair.