I have program a new board with APM 3.4.6 and when I connect to Mission Planner, there is an error message : « Failed to get rally point » (just after the connect).
I don’t find solution in forum and in wiki.
I tried with APM 3.4.4 and 3.4.5 and it it always the same problem.
That is a Mission Planner message. Looking at source code I would say that probably you have RALLY_TOTAL parameter set with same value but there is no actual rally point stored. Try setting the RALLY_TOTAL parameter to zero - you shouldn’t normally touch this parameter! Also, if you want rally points loaded, you’ll have to load them again.