Hi, I am writing a value to Parameter Number 5243, which, according to the documentation I have, is Work Offset 2Y. But it appears on the Offsets Page as Work Offset 2Z, and after a G55 the Z axis position reflects the new Y offset. I am only using work offsets 1 and 2 at the moment and I can cope with entering the parameter values I need by offseting the location by one, but it would be reasuring to get to the bottom of this. Cheers, Kit