Thank you, I think you are leading me into the right direction. I’ve simplified the string to not use the property names, but I still had to to set either 0 or 1 for the properties, because bMaskUsingCustomDepth is one the later bools. So the following command works in the editor: HighResShot 3840x2160 0 0 0 0 1 0 0 0 filename="C:/RobodoCaptures/screenshot.png
But unfortunately in the development build the editor crashes with this command and returns the same error as previously…