Why PinX not equals X?

[tanshiyang]

I just want to get the shape's X position, I try to use PinX, but I noticed PinX not equals X some times, can you tell me why?

[Surrogate]

Check PageSheet. Ruller & Grid section
Set XRulerOrigin and YRulerOrigin to 0 mm

[tanshiyang]

Thank you!