Sorry, an internal error has occurred: trying to do an external access of a non-created background gworld. Sorry, an internal error has occurred: trying to do an external access of a non-created computation gworld. Sorry, an internal error has occurred: trying to do an external access of a non-created sprite gworld. Sorry, but one of the graphics worlds (background world) couldn't be created. Try giving Mars Rising some more memory. Sorry, but one of the graphics worlds (sprite world) couldn't be created. Try giving Mars Rising some more memory. Sorry, but one of the graphics worlds (comp world) couldn't be created. Try giving Mars Rising some more memory.