Odd error clamping Y axis Mori SL-25SY

Small program to drill hole in end of workpiece with live tool (axial), get message "EX2002 Y axis not possible to move" I halfway suspect it has to do with carriage being all the way at X0 but I don't know much about this old machine yet.


So the thing is, the Y axis lock macro moves the Y axis up a little before inserting the base block (base block is a literal steel block that a hydraulic ram pushes between Y axis slide and base, to keep it from moving under turning load; then moves the Y axis back down(0.100" or so) onto the block). So it says Y axis not possible to move during Y axis clamp sequence, is there any reason the machine wouldn't like moving the Y axis with the carriage at it's zero return point in code?

Any help is appreciated!

Fanuc 16T control (MSC-516)

Make sure all your axis are zero returned right before you lock or unlock the y axis our mori had some play in the y axis so it would move slightly out during operation and you can't lock or unlock the axis if all the lights aren't light up. And your not allowed to move the y axis at all once it is locked we couldn't even leave a y axis offset in our machine or it would lock up when it tried to run the tool.