i get a no rail signal when trying to use farl but have rail in train and on me is this a bug or something change ?

What's the exact error message? A yellow text "Out of rail signal" above FARL means there are no more rail signals in the train.

no i found it was because of bio industrie was going to restart a new game when farl juste made a update for that

after trying with new version my farl still dosent work with bioindustrie wooden rail

edit:found how to use it just have to select wooden rail in the farl menu