If arnold to katana is installed. Make sure to put at this location as the default .bat file pointed at. Run this .bat file should work
C:\Program Files\Katana3.2v1\thirdPartyInstallers\KtoA-2.4.0.2-kat3.2-windows\launchKtoA.bat
Or try this batch
set OCIO=ocioPathLocation
set KATANA_HOME=C:\Program Files\Katana3.2v1
set KTOA_HOME=C:\Program Files\Katana3.2v1\thirdPartyInstallers\KtoA-2.4.0.2-kat3.2-windows
set DEFAULT_RENDERER=arnold
set “KATANA_TAGLINE=With KtoA 2.4.0.2 and Arnold 5.4.0.1”
set KTOA_ROOT=”C:\Program Files\Katana3.2v1\thirdPartyInstallers\KtoA-2.4.0.2-kat3.2-windows”
set “path=%KTOA_HOME%\bin;%path%”
set “KATANA_RESOURCES=%KTOA_HOME%”
“%KATANA_HOME%\bin\katanaBin.exe”