I'm not certain, but it looks like your message might be arriving with everything in the "address" of your OSC message.
Be sure that the "address" portion is only /replyFormat.
The message should have a single argument, which in my example above was "/myReply \"#data#\"".
The way a Network cue in QLab parses a message string requires that you put quotation marks around the format so that it will be interpreted as a single argument. If the app you are using to send your message already lets you specify the address and the argument separately, then try without enclosing your format in quotation marks, which also means you won't need to escape your inner quotes, like /myReply "#data#"
Brent