Report Problem sending IR commands in General Questions Posted November 29, 2020 OK, Got it working finally with your example. I was able to successfully transmit the message from computer #1 to computer #2. But I had issues when transmitting from computer#2 to computer #1. I was getting the error: "[E] util/flirc_util/src/cmds/ir_transmit.c sendir(96): Error: invalid length, must be even" I re-installed flirc and rebooted computer #2 and then things worked as expected. Follow-on question ... Since I can capture the remote buttons in FLIRC, then is it possible to transmit these same values either by providing the 'keystroke' that was defined, or perhaps getting access to the pattern that was stored in FLIRC?