The mission has no landing approach to jump to
What ArduPilot says:
- Unable to start find a landing abort sequence
- Unable to start landing sequence
ArduPilot was asked to go to the mission's landing approach and found no DO_LAND_START item it could switch to. The second message is its twin for an aborted landing: the mission holds no DO_GO_AROUND item. In both cases the aircraft carries on without the planned route: in the first it stays in its mode or falls back to an ordinary RTL, in the second it flies its standard go-around.
What to do, most likely first
The mission has no
DO_LAND_STARTitem, or no mission is loaded at all.CheckRead the mission from the aircraft and look for
DO_LAND_STARTin front of the approach waypoints.FixAdd
DO_LAND_STARTbefore the approach and the landing, and write the mission again.
Parameters to look at
| Parameter | What it is |
|---|---|
MIS_TOTAL | Total mission commands |
Where to do it:Mission Energy Check
The code that sends it
Unable to start find a landing abort sequence
libraries/AP_Mission/AP_Mission.cpp AP_Mission::jump_to_abort_landing_sequence() · Open in ArduPilot Copter-4.7.1
Unable to start landing sequence
libraries/AP_Mission/AP_Mission.cpp AP_Mission::jump_to_landing_sequence() · Open in ArduPilot Copter-4.7.1