A client set to a RIG MODEL (Kenwood, Yaesu, …) pointed at the CAT-sharing port
speaks raw rig dialect: "ID;", "IF;". That is not rigctl, so it fell to the
unknown-command branch and got RPRT -11 like anything else.
The symptom hides the cause completely. RPRT -11 has no ';' for the client's
parser to terminate on, so it waits out its timeout and reports "reply
incomplete, got nothing" — a hard failure that reads as "OpsLog's CAT sharing
does not work", when it is one setting in the other program.
A frame ending in ';' with no space in it cannot be a rigctl command, so the log
now says what it is and what to set instead. Reported from Nexus, whose Hamlib
error named kenwood_transaction — the one word that gave it away.