Navigation reachability result

why_unreachable reports evidence about a route on the current baked mesh; despite this catalog name, the code is not a generic bake failure. A complete permitted corridor is informational, while an unreachable or capacity-limited query is a warning. The query does not change the mesh and may return the nearest reachable point.

#Common causes

• The start has no permitted nearby polygon, or the goal is outside the baked surface.
• The connecting corridor or goal uses a forbidden area, or disconnected islands need a link or geometry change.
• Path search exhausts its capacity; a disabled authored link may be suggested as a candidate, not proof of a connection.
• A complete permitted corridor exists, producing an informational result that needs no repair.

#Fixes

• Move or project endpoints onto permitted navigation polygons, or rebake the relevant geometry when the intended surface is absent.

• Inspect the reported area filter and candidate link; enable the intended link or add the missing connection, then query again.

• Increase query capacity before concluding that a truncated search proves disconnection.

• Leave a successful informational result unchanged.

• Code: ARA7100

• Constant: nav::BUILD

• Reported by: ara-nav