During flashing with Flashwriter, the 'inum 0' command is issued to the router, this simply tells the router to run the main firmware image file, 'image' at boot.
This will be needed if the router was running 'image1' for example, but under normal circumstances it will not make any difference at all. As long as the router boots normally after flashing, there is nothing to worry about if this command returns an error.
inum 0 = run main firmware image 'image'
inum 1 = run 'image1'
inum 2 = run 'image2'
Mar 20, 2019