Cannot place any trackside objects.

I have suddenly become unable to place any trackside objects. Everytime I try I get this message:

And this is with all track types and on all routes.

Close Trainz.

Open Content Manager.

Search for Track splines

Installed True.
Built-in False.

Open the tracks for editing. If you have a lot do them in bunches.

Once opened, wait a minute, the submit the assets.

This will reset the tracks into tracks and allow you to place trackside objects again.

This is a known problem and N3V is aware of the issue. It has something to do with a glitch in assets.tdx.

That worked! Thanks!