Line error detected: FRAMING

Hi All,
I'm using a serial TAP board to sniff serial port , and sometime I get a "Line error detected: FRAMING" in log
What mean this error and where it come from ?

Thanks for help.

Thierry

FRAMING error happens when the stop bit(s) is not set where it should be (so the byte frame was not correctly received). Unless it only happens occasionally (and I mean, almost-never kind of occasionally), it's a sign to double-check serial settings (baud rate, data bits, parity bit, stop bits) and wiring (make sure to minimize possible electrical disturbances).