Hi,
What do you mean by "did not respond"? Did the command hang? In theory the command should open a text editor window (either in a terminal or as a separate GUI window, depending on how you have things configured), and then wait for you to close that window, so if it was hanging, I suspect maybe you had an editor window open somewhere that you didn't see.
As an alternative, you can just create and edit an `
args.gn` file in your out/Release directory, and then run `gn gen`. That will use the existing file and generate the ninja files.
-- Dirk