Hi ,
I’ll try to help you get to the bottom of this.
There are different workflows for projects designed to work with the binary (ie. 7gb) build and the GitHub build. The RocketGenerateProjectFiles.bat file is designed only for the binary build.
For GitHub, the command line to generate projects should be:
(GitHub Engine Path)\Engine\Build\BatchFiles\GenerateProjectFiles.bat (UProject Path)
eg.
D:\git\ben-marsh\UnrealEngine\Engine\Build\BatchFiles\GenerateProjectFiles.bat D:\ShooterGame\ShooterGame.uproject
Can you post what happens when you try to run this command?