Only difference in below commands is the length of the define SIMONSAYSMORECHARSARENEEDEDT

BREAKS:: 2487
"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\tools\arm-none-eabi-gcc\7-2017q4/bin/arm-none-eabi-g++" -c -w -g -Os -nostdlib "@C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\variants\ARDUINO_NANO33BLE/defines.txt" "@C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\variants\ARDUINO_NANO33BLE/cxxflags.txt" -DARDUINO_ARCH_NRF52840 -MMD -mcpu=cortex-m4 -DARDUINO=108010 -DARDUINO_ARDUINO_NANO33BLE -DARDUINO_ARCH_MBED -I"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\cores\arduino" -I"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\variants\ARDUINO_NANO33BLE" -I"c:\program files (x86)\microsoft visual studio\2019\community\common7\ide\extensions\tqc42znx.ulo\Micro Platforms\default\debuggers\VM_DBG" -I"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\libraries\Wire" -I"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\libraries\USBMSD" -I"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\libraries\USBHID" -I"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\libraries\SPI" -I"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\libraries\PDM\src" -I"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\libraries\mbed-memory-status"  -O0 -DVM_DEBUG_BREAKPAUSE -DVM_DEBUGGER_TYPE=VM_DEBUGGER_TYPE_GENERIC_OBJECT -DVM_DEBUGGER_SOFT_TRANSPORT_WRITER=Serial -DVM_DEBUGGER_SOFT_TRANSPORT=Serial -DVM_DEBUG_BANDWIDTH_THROTTLE_MS=33 -DVM_DEBUG -DVM_DEBUG_ENABLE=1 -DVM_DEBUGGER_TYPE_GENERIC_OBJECT=21 -DVM_DEBUGGER_TYPE_HARDWARESERIAL2=14 -DVM_DEBUGGER_TYPE_TTYUART=8 -DVM_DEBUGGER_TYPE_UART=5 -DVM_DEBUGGER_TYPE_FASTSERIAL=2 -DVM_DEBUGGER_TYPE_SOFTWARESERIAL=1 -DVM_DEBUGGER_TYPE_HARDWARESERIAL=0 -DSIMONSAYSMORECHARSARENEEDEDT=1 "-IC:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\cores\arduino/api/deprecated" "-iprefixC:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\cores\arduino" "@C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\variants\ARDUINO_NANO33BLE/includes.txt" "c:\program files (x86)\microsoft visual studio\2019\community\common7\ide\extensions\tqc42znx.ulo\Micro Platforms\default\debuggers\VM_DBG\VM_DBG.cpp" -o "C:\Users\Simon\AppData\Local\Temp\VMBuilds\PathLengthTest\nano33ble\Debug\VM_DBG\VM_DBG.cpp.o"
arm-none-eabi-g++: error: CreateProcess: No such file or directory

WORKS:: 2486
"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\tools\arm-none-eabi-gcc\7-2017q4/bin/arm-none-eabi-g++" -c -w -g -Os -nostdlib "@C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\variants\ARDUINO_NANO33BLE/defines.txt" "@C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\variants\ARDUINO_NANO33BLE/cxxflags.txt" -DARDUINO_ARCH_NRF52840 -MMD -mcpu=cortex-m4 -DARDUINO=108010 -DARDUINO_ARDUINO_NANO33BLE -DARDUINO_ARCH_MBED -I"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\cores\arduino" -I"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\variants\ARDUINO_NANO33BLE" -I"c:\program files (x86)\microsoft visual studio\2019\community\common7\ide\extensions\tqc42znx.ulo\Micro Platforms\default\debuggers\VM_DBG" -I"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\libraries\Wire" -I"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\libraries\USBMSD" -I"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\libraries\USBHID" -I"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\libraries\SPI" -I"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\libraries\PDM\src" -I"C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\libraries\mbed-memory-status"  -O0 -DVM_DEBUG_BREAKPAUSE -DVM_DEBUGGER_TYPE=VM_DEBUGGER_TYPE_GENERIC_OBJECT -DVM_DEBUGGER_SOFT_TRANSPORT_WRITER=Serial -DVM_DEBUGGER_SOFT_TRANSPORT=Serial -DVM_DEBUG_BANDWIDTH_THROTTLE_MS=33 -DVM_DEBUG -DVM_DEBUG_ENABLE=1 -DVM_DEBUGGER_TYPE_GENERIC_OBJECT=21 -DVM_DEBUGGER_TYPE_HARDWARESERIAL2=14 -DVM_DEBUGGER_TYPE_TTYUART=8 -DVM_DEBUGGER_TYPE_UART=5 -DVM_DEBUGGER_TYPE_FASTSERIAL=2 -DVM_DEBUGGER_TYPE_SOFTWARESERIAL=1 -DVM_DEBUGGER_TYPE_HARDWARESERIAL=0 -DSIMONSAYSMORECHARSARENEEDED=1 "-IC:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\cores\arduino/api/deprecated" "-iprefixC:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\cores\arduino" "@C:\Users\Simon\AppData\Local\arduino15\packages\arduino\hardware\mbed\1.1.4\variants\ARDUINO_NANO33BLE/includes.txt" "c:\program files (x86)\microsoft visual studio\2019\community\common7\ide\extensions\tqc42znx.ulo\Micro Platforms\default\debuggers\VM_DBG\VM_DBG.cpp" -o "C:\Users\Simon\AppData\Local\Temp\VMBuilds\PathLengthTest\nano33ble\Debug\VM_DBG\VM_DBG.cpp.o"