Error: s0: Error during execution of "<Quartus® Prime installation>/nios2eds/Nios® II Command Shell.bat} make all 2>> stderr.txt": child process exited abnormally - Error: s0: Error during execution of "<Quartus® Prime installation>/nios2eds/Nios® II Command Shell.bat} make all 2>> stderr.txt": child process exited abnormally Description Due to a problem in the Quartus® Prime software, you may see this error message during the compilation of the sequencer microcode when generating the External Memory Interface UniPHY IP. This issue occurs when the PC Windows Subsystem for Linux parameter is enabled and a bash.exe process is seen in Windows Task Manager. Resolution In the Windows Control Panel > Programs > Programs And Features > Turn Windows features on or off , unselect the parameter : Windows Subsystem for Linux . Reboot the PC, open the Quartus® Prime project and regenerate the UniPHY IP. Custom Fields values: ['novalue'] Troubleshooting 533911 False ['DDR2 SDRAM Controller with UniPHY IP', 'DDR3 SDRAM Controller with UniPHY IP', 'LPDDR2 SDRAM Controller with UniPHY IP', 'QDR II and QDR II+ SRAM Controller with UniPHY IP', 'RLDRAM 3 UniPHY IP', 'RLDRAM II Controller with UniPHY IP'] ['FPGA Dev Tools Quartus® Prime Software Standard', 'FPGA Dev Tools Quartus II Software'] No plan to fix 17.1 ['Arria® V FPGAs and SoCs', 'Cyclone® V FPGAs and SoCs', 'Stratix® III FPGAs', 'Stratix® IV FPGAs', 'Stratix® V FPGAs'] ['novalue'] ['novalue'] ['novalue']