After the "radio calibration" procedure is done I'm getting the message that channel 2,4,5 or 1.6.7…. "Failed to set channel x". Every calibration the error is in deferent channels. Only one time I didn’t get any error.
However, the channel PWM summary looks OK and all channels are working:
APM 1 last version
Pixhawk with last Arduplane firmware
Thanks for helping,