Updating GRBR V0.9 to 1.1 "not in sync" error message

Board : NANO
MEGA 328P

During the compile I get a low memory warning message, otherwise no apparent errors.

During the upload I get the following messages, with a "not in sync" error message at the end.

Arduino: 1.8.10 (Windows 10), Board: "Arduino Nano, ATmega328P"

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\Don\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -tools C:\Users\Don\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Don\Documents\Arduino\libraries -fqbn=arduino:avr:nano:cpu=atmega328 -vid-pid=1A86_7523 -ide-version=10810 -build-path C:\Users\Don\AppData\Local\Temp\arduino_build_560697 -warnings=none -build-cache C:\Users\Don\AppData\Local\Temp\arduino_cache_186258 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino5.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\Don\Documents\Arduino\libraries\grbl\examples\grblUpload\grblUpload.ino
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\Don\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -tools C:\Users\Don\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Don\Documents\Arduino\libraries -fqbn=arduino:avr:nano:cpu=atmega328 -vid-pid=1A86_7523 -ide-version=10810 -build-path C:\Users\Don\AppData\Local\Temp\arduino_build_560697 -warnings=none -build-cache C:\Users\Don\AppData\Local\Temp\arduino_cache_186258 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino5.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\Don\Documents\Arduino\libraries\grbl\examples\grblUpload\grblUpload.ino
Using board 'nano' from platform in folder: C:\Program
Using core 'arduino' from platform in folder: C:\Program
Detecting libraries used...
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\sketch\\grblUpload.ino.cpp" -o nul
Alternatives for grbl.h: [grbl]
ResolveLibrary(grbl.h)
-> candidates: [grbl]
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\sketch\\grblUpload.ino.cpp" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\coolant_control.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\eeprom.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\gcode.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\jog.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\limits.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\main.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\motion_control.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\nuts_bolts.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\planner.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\print.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\probe.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\protocol.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\report.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\serial.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\settings.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\spindle_control.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\stepper.c" -o nul
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl\\system.c" -o nul
Generating function prototypes...
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\sketch\\grblUpload.ino.cpp" -o "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\preproc\\ctags_target_for_gcc_minus_e.cpp"
"C:\\Program Files (x86)\\Arduino\\tools-builder\\ctags\\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\preproc\\ctags_target_for_gcc_minus_e.cpp"
Compiling sketch...
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -MMD -flto -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10810 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino" "-IC:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\variants\\eightanaloginputs" "-IC:\\Users\\Don\\Documents\\Arduino\\libraries\\grbl" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\sketch\\grblUpload.ino.cpp" -o "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\sketch\\grblUpload.ino.cpp.o"
Compiling libraries...
Compiling library "grbl"
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\eeprom.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\jog.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\limits.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\coolant_control.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\gcode.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\main.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\motion_control.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\nuts_bolts.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\print.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\planner.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\probe.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\report.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\protocol.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\settings.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\serial.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\spindle_control.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\stepper.c.o
Using previously compiled file: C:\Users\Don\AppData\Local\Temp\arduino_build_560697\libraries\grbl\system.c.o
Compiling core...
Using precompiled core: C:\Users\Don\AppData\Local\Temp\arduino_cache_186258\core\core_arduino_avr_nano_cpu_atmega328_0c812875ac70eb4a9b385d8fb077f54c.a
Linking everything together...
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-gcc" -w -Os -g -flto -fuse-linker-plugin -Wl,--gc-sections -mmcu=atmega328p -o "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697/grblUpload.ino.elf" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\sketch\\grblUpload.ino.cpp.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\coolant_control.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\eeprom.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\gcode.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\jog.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\limits.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\main.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\motion_control.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\nuts_bolts.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\planner.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\print.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\probe.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\protocol.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\report.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\serial.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\settings.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\spindle_control.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\stepper.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697\\libraries\\grbl\\system.c.o" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697/..\\arduino_cache_186258\\core\\core_arduino_avr_nano_cpu_atmega328_0c812875ac70eb4a9b385d8fb077f54c.a" "-LC:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697" -lm
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-objcopy" -O ihex -j .eeprom --set-section-flags=.eeprom=alloc,load --no-change-warnings --change-section-lma .eeprom=0 "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697/grblUpload.ino.elf" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697/grblUpload.ino.eep"
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-objcopy" -O ihex -R .eeprom "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697/grblUpload.ino.elf" "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697/grblUpload.ino.hex"
Multiple libraries were found for "grbl.h"
Used: C:\Users\Don\Documents\Arduino\libraries\grbl
Using library grbl in folder: C:\Users\Don\Documents\Arduino\libraries\grbl (legacy)
"C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-size" -A "C:\\Users\\Don\\AppData\\Local\\Temp\\arduino_build_560697/grblUpload.ino.elf"
Sketch uses 29762 bytes (96%) of program storage space. Maximum is 30720 bytes.
Global variables use 1633 bytes (79%) of dynamic memory, leaving 415 bytes for local variables. Maximum is 2048 bytes.
Low memory available, stability problems may occur.
C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude -CC:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf -v -patmega328p -carduino -PCOM7 -b115200 -D -Uflash:w:C:\Users\Don\AppData\Local\Temp\arduino_build_560697/grblUpload.ino.hex:i

avrdude: Version 6.3-20190619
Copyright (c) 2000-2005 Brian Dean, [www.bdmicro.com]
Copyright (c) 2007-2014 Joerg Wunsch

System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf"

Using Port : COM7
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x0d
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x0a
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x47
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x72
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x62
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x6c
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x20
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x30
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x2e
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x39

avrdude done. Thank you.

An error occurred while uploading the sketch



Any recommendations?

As it turns out:
Under "Tools", "Processor", Select "ATmega 236P (Old BootLoader)"
Gets rid of the sync error.