Hey Geoff, many thanks and it works exactly how I expected
This was a command to request a dump of the current patch for the esx and it works. I have also tested resending the reply (acquired with Midi Monitor, Saved, Changed the extension and resent via Librarian) from the Esx and 100% works.
since I'm new as I mentioned, I'm trying to understand you when you write "create a dummy file to then edit into a binary file" is there a specific sw I can use for this on mac?
I hope this is not too stupid question