Why do I get the message "Flight plan not sent. Too many characters for panel" with my Flight Stream 510?

If you get the message, "Flight plan not sent. Too many characters for panel", this is most likely due to having an old firmware version on your Flight Stream 510.  You will need to update your firmware to version 2.10 or later.  Your avionics shop should be able to perform the firmware upgrade for you.  After the firmware is updated, the flight plan transfer should work without further problems.