NML tutorial buggy?

[MagicBuzz]

Hello,
I'm trying to create a new GRF, and I'm discovering the NML language.

I tried to compile the NML tutorial code, and I get an error :

Code: Select all

nmlc ERROR: "mytrain.nml", line 214: Unknown property name: shorten_vehicle

I tried to find in the available variables if I can see a deprecated variable named shorten_vehicle or some variable with a similar name, but I can't.

Am I doing something wrong?

When I comment this line it compiles correctly... but as a programmer I don't like commenting things I don't understand...

[jfs]

Which version of NML are you using?

[MagicBuzz]

This one : 7.1 (Windows)
https://github.com/OpenTTD/nml/releases