Mavproxy udpout at startup fails

I’m using the Jetson TK1 and I’ve successfully started a simple mavproxy link at startup with

however, when I add the udp output

the code does not succeed at startup. This same line runs with no issues from the command line after bootup. Any thoughts? I’ve tried to sleep for up to 5 seconds in the beginning of the rc.local file without success.

It turns out I was assigning the wrong FTDI cable to usb.PIXHAWK. The code I wrote above successfully starts the udp link…if your device is entered correctly.