Ya, I tried placing a Waypoint over the "House" object for the watchtower and selected the required position (in this case #4) and the following in the On Activation field:
this action["ladderup",nearestbuilding this]
But the AI Unit moves to the house position at groundlevel - teleports to the ladder, climbs up and halts on the platform at top.
This tower is at Fi17 on Malden, built into the island, not an user placed object.
I tried placing the waypoint close to the physical location of the ladder's base with the abovementioned line in the On Activation field. I then made a second waypoint on the house object and selected the house position, but I believe that there is not enough distance for the second waypoint to activate.
Is there a way to combine "SetPos" and "BuildingPos" commands to move the unit to the right spot when he gets to the top?