nios2_command_shell fails - nios2_command_shell fails Running old Quartus Prime 18.0 on Windows 10 On some Windows 10 machines, I observe the following: From the Nios II Eclipse environment, launching Nios II Command Shell fails. Also fails when launching from Dos window. The error messages "c:/intellFPGA_lite/18.0/nios2eds/nios2_command_shell.sh: line 41: /bin/dirname: Bad address While on other Windows 10 machines, there is no problem Replies: Re: nios2_command_shell fails Mark, May I know if you are able to work on this? Replies: Re: nios2_command_shell fails Hi Mark, Does the other machine has exact same env? In this case seem more to OS/env issue rather than Quartus. Could be during installation, there is some path messed up and causing the issue. Replies: Re: nios2_command_shell fails I determined that one particular line in the script C:\intelFPGA_lite\18.0\nios2eds\nios2_command_shell.sh works on one Windows 10 PC but not another. If I split the following line into two statements, then the problem goes away. _ACDS_ROOT=$(dirname $(dirname ${_this_nios2_command_shell_script})) Solution: _R1=$(dirname ${_this_nios2_command_shell_script}) _ACDS_ROOT=$(dirname $_R1)