One-Way / Single Direction airways?

I didn’t know there was such a thing until Little Navmap gave me an error with a route stating that I was going the wrong direction on a one-way airway.

Is there a way to ensure Charts only uses the correct airway direction? Autogenerating this route: LPPT/02 GANS6N GANSU UN975 RAKUN RAKU1P LPMA/PILIM.R23

UN975 appears to be one-way towards the island.

Hi,

I don’t see any issue with your route. UN975 is southbound between LPPT and LPMA, and so is your route. Charts does respect directionality constraints.

Could you be more specific about the LNM error message?

Regards,

Stephen