Mill Reserved word for Index coordinates X and Y.

[Anonymous]

What is the Mill Reserved Word for the X and Y index coordinates found on the Setup Properties when Indexing is selected. 

Setup Properties

I'm able to retrieve the value for the Z with "Z<Z-INDEX-CLR>".

I've tried   "Y<-INDEX-CLR>" and get the following: "ERROR...<Y-INDEX-CLR>.

Thanks

Jay