Jan 22, 2017 - 05:01 AM
Your asset (name of the object) is either missing dependencies or it's faulty. If it's a locomotive or a wagon, it won't appear in the railyard nor in Surveyor. Content Manager is here to tell you the current state of the asset. Select the object and click "Errors & Warnings" section to see what's wrong with it.
I hope my explanation is helpful to you.