Hm, allowed address characters in OSC are [a-z][A-Z][0-9] I’m with pianopaul, if 1.5 is your argument to send then the correct buildup would be /eos/cue/fire 1.5 like piano paul outlined
What lightning console are we talking about?
Edit: forgot attachment
Edit2: from your screenshots, and if its a LXdesk EOS
Maybe you have to send /1/5/ instead of /1.5/
