How do I guarantee that obstacle map has been regenerated?

I've struggled with this one as path-finding is asynchronous. Due to this construct 2 actually has a way of dealing with the asynchronous nature of path-finding by having an event that will fire when a path is found (because it does not complete at a strict time such as one tic or after 'x' seconds. No problem there.

Issue comes in when I regenerate obstacle maps. How do I actually know when its completed? There is no event called 'On obstacle map regeneration complete'. I've tried using wait 0 seconds to force the code to run at the end of a tic however this does not work because it can take more than the tic to complete. I've tried using wait 3 seconds and this seemingly works but i'm simply guessing (and gambling) how long it will take to regen obstacle map and if I guess wrong for the 'longest' time it would ever take then the entire thing falls apart.

Does anyone have a guaranteed way (strict way) to 'know' when the obstacle map has been regenerated so I can then call a new path-find event? Why is there no event called 'on obstacle map regenerated'?

This should not be a problem because you should not be pathfinding every tick and you should not be regenerating the obstacle map every tick. If it needs to be fast, you can regenerate a region of the map which is faster than the whole map or as the manual suggests you can add a short wait if you are trying to find paths immediately after regenerating the obstacle map.

So i'm not doing pathfinding or regen obstacle map every tic (that would be nuts). I'm only doing regen and pathfinding when I deem the obstacle map 'dirty' in other words something changed in the obstacle map because the user added or deleted something.

Again I need a guaranteed way of knowing when the obstacle map has been regenerated, exactly like the already existing event 'on path found' does.

It says in the description "Completes next tick". So "Wait 0" should be enough. Are you sure it takes more than one tick sometimes? In my tests it's always 1 tick.