The fence is switched on, but no fence exists

What ArduPilot says:

• Fences enabled, but none selected

FENCE_ENABLE is 1, but FENCE_TYPE selects no fence that exists. FENCE_TYPE is a set of bits: bit 0 (value 1) maximum altitude, bit 1 (value 2) a circle around home, bit 2 (value 4) polygons and circles drawn in the ground station, bit 3 (value 8) minimum altitude. The drawn fences count only when at least one has been uploaded to the aircraft.

What to do, most likely first

1. FENCE_TYPE is 4 (drawn fences only, which is Plane's default) and no polygon or circle has been uploaded.

   CheckRead the fence from the aircraft in the ground station's Plan screen: it comes back empty.

   FixDraw an inclusion polygon around the flying area and write it to the aircraft. Or add other types to FENCE_TYPE: 1 for a maximum altitude, 2 for a circle around home.

2. FENCE_TYPE is 0: no type is selected.

   FixChoose the types you want. Copter's default FENCE_TYPE is 7: maximum altitude, circle and drawn fences together.

Parameters to look at

Where to do it:Failsafe Explainer