I have a round part with a timming flat on it. I am using a five axis machine to machine it. I need to rotate the table(B axis) 90. I need to do a c axis skew with the probe. I need to have the probe go down on z to pickup the timming flat. Once it touched two positions on the flat I want it to move the c axis square to the machine. I got it all working up to the point where it finished the two touches on the timming flat, after touching the second point the machine

the error messagew says i can not divide by 0.

Can someone help me with this?