Thanks! I had forgotten about TSKA. It doesn't work well for me as (as far as I know) Siemens never got the graphics display working for the 40T. However, I was able to get it working enough to remote kill the callback indicator.
My system doesn't have the CBKNAMB parameter. I've got RCBKB, RCBKNA, and CBKBMAX. No idea what any of those do.
I whish I knew how to turn that callback function off for the entire system. 100% of the time it's done by mistake.
Thanks again sbcsu!