Auto bed levelling... strange behavior

Hello guys,

After setup Autobed leveling on my G3D printer (like i3 PRUSA), all is fine except one thing : G29 do only 3 points even with #ifdef AUTO_BED_LEVELING_GRID defined and 4 points coordinates defined !
When I change value of 4 points coordinates, the 3 first points are ok but 4th point is never done!!

Some ideas about that !

Thank you so much

I haven't experienced this problem specifically, but are you using the most recent version of the Marlin firmware? I was tearing my hair out a few months ago, only to find that there were bugs discovered in the G29 command. An update to the latest version of the firmware fixed everything for me. If that's not the case, please post your configuration.h file so we that can have a look.

Hello,

After tearing my hair too, I've uploaded a new version of Marlin and now all is ok :-)
Thank you very much.

Auto Bed Leveling is so comfortable !