[Question updated] isaaclab.bat execution error

[kuh0729]

Hello :)

I'm currently using Isaac Sim 5.0 and the latest version of Isaac Lab (2.2). When I run isaaclab.bat from version 2.2, I get the below error message. However, it works fine with version 2.1. Do you know what might be causing this?

'reserved.' is not recognized as an internal or external command,
operable program or batch file.
'irectory' is not recognized as an internal or external command,
operable program or batch file.
'" (' is not recognized as an internal or external command,
operable program or batch file.
't' is not recognized as an internal or external command,
operable program or batch file.
'OR]' is not recognized as an internal or external command,
operable program or batch file.
'ctivated.' is not recognized as an internal or external command,
operable program or batch file.
'sion' is not recognized as an internal or external command,
operable program or batch file.
'python_exe' is not recognized as an internal or external command,
operable program or batch file.
'n_exe!' is not recognized as an internal or external command,
operable program or batch file.
)"') do set "ISAACSIM_VER was unexpected at this time

it’s because the closing parenthesis in the FOR /F (...) block is unexpectedly placed. Is there no fix for this?

thanks a lot :)

[kuh0729]

After modifying this part in the isaaclab.bat file, it started working. I don't know why, but I'm leaving this here in case someone else encounters the same issue.

rem check if the environment exists
call conda env list | findstr /c:"%env_name%" >nul
if %errorlevel% equ 0 (
echo [INFO] Conda environment named '%env_name%' already exists.
) else (
echo [INFO] Creating conda environment named '%env_name%'...
echo [INFO] Installing dependencies from %ISAACLAB_PATH%\environment.yml
rem -----------------------------------------------
rem patch Python version if needed, but back up first
rem -----------------------------------------------
copy "%ISAACLAB_PATH%\environment.yml" "%ISAACLAB_PATH%\environment.yml.bak" >nul
call :is_isaacsim_version_4_5
if !ERRORLEVEL! EQU 0 (
echo [INFO] Detected Isaac Sim 4.5 --^> forcing python=3.10
rem Safely rewrite only the line "- python=3.11" while preserving YAML indentation
> "%ISAACLAB_PATH%\environment.yml.tmp" (
for /f "usebackq delims=" %%L in ("%ISAACLAB_PATH%\environment.yml") do (
set "line=%%L"
rem Trim leading spaces for comparison only (do not destroy indentation in output)
for /f "tokens=* delims= " %%A in ("!line!") do set "trim=%%A"
if /i "!trim:~0,15!"=="- python=3.11" (
echo - python=3.10
) else (
echo %%L
)
)
)
rem Replace the original file with the modified version
move /y "%ISAACLAB_PATH%\environment.yml.tmp" "%ISAACLAB_PATH%\environment.yml" >nul
) else (
echo [INFO] Isaac Sim ^>=5.0, installing python=3.11
)
call conda env create -y --file "%ISAACLAB_PATH%\environment.yml" -n "%env_name%"
)