Category: Nios® II
Tools: Nios® II EDS
device:-

If you update Windows® 10 to version 1903 or higher, you will not be able to run Nios® II SBT Build and Debug As.

Applicable Quartus® Prime Version
・Standard Edition: 19.1, 20.1
・Pro Edition: 19.2, 19.3, 19.4, 20.1, 20.2, 20.3

Please install the following Knowledge Database patch.
nios2-elf-gcc.exe: error: CreateProcess: No such file or directory
https://www.intel.com/content/altera-www/global/en_us/index/support/support-resources/knowledge-base/embedded/2020/nios2-elf-gcc-exe--error--createprocess- -no-such-file-or-directo.html

You can avoid this by creating a new Nios® II SBT project after installing the patch, but please also perform Generate HDL in Platform Designer and Compile in Quartus® Prime.

<Error message example>
[Build Error]
nios2-elf-g++.exe: error: missing argument to '-msys-crt0='
nios2-elf-g++.exe: error: missing argument to '-msys-lib='
Makefile:1015: recipe for target 'soft.elf' failed
make: *** [soft.elf] Error 1

[Debug Error]
wslpath: /mnt/c/Project/software/soft/soft.elf.srec: No such file or directory
wslpath: /mnt/c/Project/software/soft/soft.elf.srec: No such file or directory
Using cable "USB-Blaster [USB-0]", device 1, instance 0x00
Processor is already paused
Leaving target processor paused
rm: cannot remove '/mnt/c/Project/software/soft/soft.elf.srec': No such file or directory

※Notes
Installing the patch on Quartus® Prime on a PC below Windows® 10 1903 will prevent the Nios® II SBT from working properly.
After uninstalling the patch, the Nios II Command Shell will not start, leaving me with no choice but to reinstall Quartus.