UBL compile error

I'm getting the following compile error when enabling AUTO_BED_LEVELING_UBL

I'm using a FLSUN Delta printer, marlin geforce-8a-ac firmware.
Attatching my config files.

I tried moving declarations around to handle the undefined and got overloading method compile errors.

Can some please give me a hand getting UBL up and running on my delta?


Arduino: 1.8.5 (Windows 7), Board: "Arduino/Genuino Mega or Mega 2560, ATmega2560 (Mega 2560)"

C:\Users\andrew\AppData\Local\Temp\ccKUDPlO.ltrans5.ltrans.o: In function `unified_bed_leveling::G29()':

ccKUDPlO.ltrans5.o.text+0x10ae): undefined reference to `probe_pt(float const&, float const&, bool, unsigned char, bool)'

ccKUDPlO.ltrans5.o.text+0x113c): undefined reference to `probe_pt(float const&, float const&, bool, unsigned char, bool)'

ccKUDPlO.ltrans5.o.text+0x11c8): undefined reference to `probe_pt(float const&, float const&, bool, unsigned char, bool)'

C:\Users\andrew\AppData\Local\Temp\ccKUDPlO.ltrans21.ltrans.o: In function `unified_bed_leveling::tilt_mesh_based_on_probed_grid(bool)':

ccKUDPlO.ltrans21.o.text+0x30a): undefined reference to `probe_pt(float const&, float const&, bool, unsigned char, bool)'

C:\Users\andrew\AppData\Local\Temp\ccKUDPlO.ltrans29.ltrans.o: In function `unified_bed_leveling::probe_entire_mesh(float const&, float const&, bool, bool, bool)':

sketch/ubl_G29.cpp:797: undefined reference to `probe_pt(float const&, float const&, bool, unsigned char, bool)'

collect2.exe: error: ld returned 1 exit status

exit status 1
Error compiling for board Arduino/Genuino Mega or Mega 2560.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.