@Fauveboy I don't know what running $ serialoscd means.....?...... but I think you should probably check through done.pd to make sure I have made no mistakes, and then make a backup of serialosc.pd and rename done.pd as serialosc.pd.
I think everything necessary for the change to port 12762 has been done (because now [$0] is added to 12289). I don't know which netsends should be using the new port, or whether port 12289 is important for one of them because monomer uses it..... and so it should not be changed.
[udpsend localhost 12002] is complaining that the port 12002 has not been opened for it to connect to (a monome port?)........ OR that it is in the wrong ip mode........ tcp instead of udp which udpsend is using and is normal for osc messages.
Monome might not be able to open port 12002 on localhost (the computer running Pd) because the firewall refuses access, or because it is not on the same subnet......?
The [route serialosc] removes the first path /serialosc (the slash is no longer there in vanilla) and the second route dumps the messages from /device /remove and /add to the first 3 outlets.
I cannot see where they were connected before.