Nucleo64 F446 Compiling problem with release 8

I have been awaiting the release for the STM32F446 processor, and it is now available here:

Unfortunately I get the following error.

exec: "cmd": executable file not found in %PATH%
Error compiling for board Nucleo-64.

The full error text is very long so I will post it at end of this note.

I completely uninstalled the IDE, reinstalled, reloaded the SAM/DUE in the board manager, and then
the JASON from the Git Hub site.

I think that this may not be directly a problem from the JASON, but I know not how to trouble shoot the problem. Any assistance would be appreciated.

Thanks Dan

Arduino: 1.8.5 (Windows 7), Board: "Nucleo-64, Nucleo F446RE, Mass Storage, Generic Serial, None, Smallest (-Os default)"

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\Dan\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -tools C:\Users\Dan\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Dan\Documents\Arduino\libraries -fqbn=STM32:stm32:Nucleo_64:pnum=NUCLEO_F446RE,upload_method=MassStorage,xserial=generic,usb=none,opt=osstd -ide-version=10805 -build-path C:\Users\Dan\AppData\Local\Temp\arduino_build_21592 -warnings=none -build-cache C:\Users\Dan\AppData\Local\Temp\arduino_cache_156192 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.CMSIS.path=C:\Users\Dan\AppData\Local\Arduino15\packages\arduino\tools\CMSIS\4.5.0 -prefs=runtime.tools.arm-none-eabi-gcc.path=C:\Users\Dan\AppData\Local\Arduino15\packages\STM32\tools\arm-none-eabi-gcc\6-2017-q2-update -prefs=runtime.tools.STM32Tools.path=C:\Users\Dan\AppData\Local\Arduino15\packages\STM32\tools\STM32Tools\2017.9.22 -verbose C:\Users\Dan\AppData\Local\Temp\untitled1006899379.tmp\sketch_jan21a\sketch_jan21a.ino
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\Dan\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -tools C:\Users\Dan\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Dan\Documents\Arduino\libraries -fqbn=STM32:stm32:Nucleo_64:pnum=NUCLEO_F446RE,upload_method=MassStorage,xserial=generic,usb=none,opt=osstd -ide-version=10805 -build-path C:\Users\Dan\AppData\Local\Temp\arduino_build_21592 -warnings=none -build-cache C:\Users\Dan\AppData\Local\Temp\arduino_cache_156192 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.CMSIS.path=C:\Users\Dan\AppData\Local\Arduino15\packages\arduino\tools\CMSIS\4.5.0 -prefs=runtime.tools.arm-none-eabi-gcc.path=C:\Users\Dan\AppData\Local\Arduino15\packages\STM32\tools\arm-none-eabi-gcc\6-2017-q2-update -prefs=runtime.tools.STM32Tools.path=C:\Users\Dan\AppData\Local\Arduino15\packages\STM32\tools\STM32Tools\2017.9.22 -verbose C:\Users\Dan\AppData\Local\Temp\untitled1006899379.tmp\sketch_jan21a\sketch_jan21a.ino
Using board 'Nucleo_64' from platform in folder: C:\Users\Dan\AppData\Local\Arduino15\packages\STM32\hardware\stm32\2018.1.18
Using core 'arduino' from platform in folder: C:\Users\Dan\AppData\Local\Arduino15\packages\STM32\hardware\stm32\2018.1.18
cmd /c "if not exist C:\Users\Dan\AppData\Local\Temp\untitled1006899379.tmp\sketch_jan21a/build_opt.h mkdir C:\Users\Dan\AppData\Local\Temp\arduino_build_21592\sketch & type NUL > C:\Users\Dan\AppData\Local\Temp\arduino_build_21592/sketch/build_opt.h"
exec: "cmd": executable file not found in %PATH%
Error compiling for board Nucleo-64.