I'm trying to create a batch file for a friend because he has some problems on minecraft. He needs to launch minecraft 80 times without closing java error... I have 2 batches, one with a while, and an other one executing java command for launching minecraft. ::Launcher.bat title Script Minecraft set tour=10 set tour2=tour :boucle set /a tour=tour-1 call "D:\thepath\Minecraft2.bat" if %tour%==0 goto suite goto boucle :suite wait javaw.exe :boucle2 set /a tour2=tour2-1 taskkill /F /IM "javaw.exe" if %tour2%==0 goto fin goto boucle2 :fin echo Appuyez sur une touche pour quitter... pause >nul and the other one ::Minecraft2.bat @echo off java -Xmx2048m -Xms1024m -cp "D:\thepath\Minecraft.exe" net.minecraft.LauncherFrame My problem is that when it calls the second batch, it's waiting for closure of the window but we must leave them opened ! If someone has already encountered this problem, I'd be grateful. Thanks PS: If my english is bad, it's because I'm french ;)