The aircraft is not in the air.

[saikrishnarao2]

I am trying to dynamically give a GPS coordinate to the FollowMeMission.

When I called startSimpleFollowMe its giving me an error "The aircraft is not in the air.".
Here are the two methods which I used for a
public void updateSimpleFollowMe(){
if(fmmo == null){
fmmo = MissionControl.getInstance().getFollowMeMissionOperator();
}
final FollowMeMissionOperator followMeMissionOperator = fmmo;
if(followMeMissionOperator.getCurrentState().equals(FollowMeMissionState.EXECUTING)) {
followMeMissionOperator.updateFollowingTarget(new LocationCoordinate2D(homeLatitude + 100 * GeneralUtils.ONE_METER_OFFSET, homeLongitude),
new CommonCallbacks.CompletionCallback() {
@OverRide
public void onResult(DJIError error) {
if (error != null) {
setRunningResultToText(followMeMissionOperator.getCurrentState().getName().toString() + " " + error.getDescription());
} else {
setRunningResultToText("Mission Update Successfully");
}
}
});
}
}
public void startSimpleFollowMe(){

    if(fmmo == null){
        fmmo = MissionControl.getInstance().getFollowMeMissionOperator();
    }
    final FollowMeMissionOperator followMeMissionOperator  = fmmo;
    if (followMeMissionOperator.getCurrentState().equals(FollowMeMissionState.READY_TO_EXECUTE)){
        fmm = FollowMeMission.getInstance().initUserData(homeLatitude, homeLongitude,15);
        followMeMissionOperator.startMission(fmm, new CommonCallbacks.CompletionCallback() {
            @Override
            public void onResult(DJIError djiError) {
                if(djiError != null){
                    setRunningResultToText(djiError.getDescription());
                } else {
                    setRunningResultToText("Mission Start: Successfully");
                }
            }
        });
    }
}