My port assignments are correct.

I have tried a second CM232 cable and double checked the Pin assignments.

The Hex tab was set correctly when I built the library file.

The keypads seem to be working correctly via RNET to control the Tuner.

I am not trying to control the CAV via RTI... only the tuner via RTI... I am running the tuner output to inputs on two receivers so that the two surround rooms can tap into a "party" mode with the house tuner. This way the RTI remotes can call presets and execute basic tuner controls without having to go to a keypad.

I will rework the strings to see if i can find any issues. I will be back on site next week.