I recently update pixhawk to V 1.3.41 and it has been working quite well only until few days ago when I found out that trying to add “DO_LAND_START” command was not possible as the command disappeared from the list. There is an “UNKNOWN” command at the bottom of he list which I guess is a corrupted “DO_LAND _START” if you like. So, anyway I tried completely uninstalling MP including deleting the MP folder located in My Documents. Re-installation did no resolve the issues, any ideas? Thanks all in advance.