Launching Map with command line ?!

Hello,

I want to launch a Map of my shipped Game from command line. I’m using this pattern for the command line : MyGame.exe /Game/Maps/MyMap (Command-Line Arguments | Unreal Engine Documentation)

But everytime the game launches to the default startup map instead of the new given map. The map name is right and the mission exists (can be loaded ingame) but with the parameter it won’t work.

I’m using *.pak files if this matters to this topic.

Thanks in advance!