Error: Execution of command "{/nios2eds/Nios II Command Shell.bat} make all 2>> stderr.txt": child process exited abnormally - Error: Execution of command "{/nios2eds/Nios II Command Shell.bat} make all 2>> stderr.txt": child process exited abnormally Description Due to a problem in the Quartus® Prime Standard Edition Software version 19.1 Windows* version onwards, you might see this error when generating the UniPHY-based External Memory Interface IP. Resolution Install the Windows Subsystem for Linux (WSL) on Windows OS for all Quartus® Prime Standard Edition Software versions 19.1 Windows version onwards. For more details, refer to this article . There is an additional workaround requirement if you are using Quartus® Prime Standard Edition software version 19.1 on Windows. For more details, refer to this article . There is an additional workaround if you use Windows 10 version 19.03 and later. For more details, refer to this article . Related Articles How to install the Windows Subsystem for Linux (WSL) on Windows OS? FATAL: Cannot generate IP in a Windows environment! Error: border: Error during execution of script generate_hps_sdram.tcl: seq: Error during execution of "{C:/intelfpga/20.1/quartus/../nios2eds/Nios II Command Shell.bat} make all 2>> stderr.txt": child process exited abnormally Custom Fields values: ['novalue'] Troubleshooting 18012993764 False ['Memory Interfaces with UniPHY'] ['FPGA Dev Tools Quartus® Prime Software Standard'] No plan to fix 19.1 ['Arria® V FPGAs and SoCs', 'Cyclone® V FPGAs and SoCs', 'Stratix® IV FPGAs', 'Stratix® V FPGAs'] ['novalue'] ['novalue'] ['novalue']