xPro v2 Hard Limit error message

I am in the process of testing a new machine with the xPro and have been receiving the following messages back from the controller: ALARM: Hard limit. This typically happens when I am running the spindle, although not always. The spindle has it's own power supply and speed controller.

I do have hard limits enabled but when this message occurs none of the limit switches are closed (verified with my meter) and typically I am not even close to the limit switches.

1) is there a way i can tell...

xPro v2 Hard Limit error message