I have found a bug in the Repetier version 1.0.4.
if you use a Z-Prob and you have configured it completely and then you use the command M119 to check if the inputs are on high or low. During the first 2 minutes when Z min is pressed, z min is displayed as LOW and the Z-Prob as HIgh.
If Z min is not operated, Z min is displayed as Low and the Z-Prob is displayed as Low.
After about 2 minutes, z min and Z-Prob will be displayed as LOW and this state will not change.
in version 0.92.9 this is not the case.