It looks like OSMC works differently from raspbian. I had the same problem and it was sorted by irsend -d /run/lirc/lircd-lirc0 SEND_ONCE “name of remote” “KEY_TO_BLAST”. If you try out the irsend -d /run/lirc/lircd-lirc0 LIST “” “” you should get back a list of remotes. However that doesn’t seem to be the only issue. I am going to try some other things mentioned in this page - http://wiki.openelec.tv/index.php/Guide_to_Lirc_IR_Blasting. If you sort out before me let me know.