Why AI can't use my trains?

[MagicBuzz]

Hello,

I created (still work in progress) a French standard gauge train set, and I was checking if an AI would use it.

I tested a few AIs, and none was able to use it.

I found in the GRF specs a few parameters about AI, but with no real explanation.

Is there a "how to" or some tutorial to help building vehicles usable by AIs?

-- Edit: Actually I found AAAHogEx was the only one that can use my trains

[odisseus]

If some AIs can use your trains and some others cannot, the problem is likely within those AIs. Some of them might assume that the default train set will be the only one they will ever need.

[HGus]

Most up to date AIs will check conditions as speed or cost before choosing a train. Is your set the only GRF for trains in your tests?

[MagicBuzz]

As odisseus pointed out, I was using old AIs scripts that were assuming I was using the standard trains.