Error with 16 - 17 upgrade script

[color=#3f4549][size=small][font=‘Helvetica Neue’, arial, sans-serif]I get this error:[/font][/size][/color]

Did you copy the command from the site?
The output just indicates that you did not enter the command correctly.

chmod a+xr upgrade-16_to_17.sh

Is the correct command. Please try again.