Error: Z+ limit hit

I haven’t used my Arcdroid in a while, so I was setting everything back up and re-calibrating everything. My calibration went fine, but when I went auto-level the ArcDroid, I recieved the following error:

Error: Z+ limit hit Reduce z-clear height.

I’ve tried adjusting it, but continue to get this error. It worked fine before, so I’m not sure what’s happened. Any ideas? Updated to latest cut and firmware.

Check and see if you’re on mm or inch I screwed that up last night