#error You need to define Z_PROBE_PIN to use z probe!
this error appear when i use the frameware of repetier on arduino
can anyone help me because it appear many times and i did not find solution to it until now.
You have configured firmware to use a z probe. But you have not set a pin where the z probe is connect to. Search
I think you still have it on -1 which means not connected. If you use the config tool select the z probe bin there with the dropdown.