"debug_level ai=4" not working

[Harikawashi]

Hi. I'm just starting to try out AI dev for openTTD, and I'm following the instructions from the wiki here: http://wiki.openttd.org/AI:Introduction

From the wiki:

Enable output of print and AILog.* statements from your AI by typing
debug_level ai=4

However, when I type "debug_level ai=4", I get the error popup:

"Unknown debug level 'ai=4'"

What am I missing?

[planetmaker]

the debug type was changed from ai to script with the advent of game scripts.

Thus
script=4
should do the trick. You might want to update the wiki

also ./openttd -h does list the available debug facilities

[Harikawashi]

Thanks! I've updated the wiki accordingly.