OK, Can anyone tell me what Exactly what could cause an alarm 4 - Probe not in expected initial state before starting probe cycle when ..... I am running grbl 1.1f, and UGS Platform 2.0 nightly build. I went through all my settings, and from what I can tell, everything looks ok (which doesn't necessarily mean they are), and the wording of the alarm is very vague, so I am not sure what the issue is. A list of possible causes could help me troubleshoot would help immensely! Thanks, Nate