where is the nrfutil log file

[zeroking5]

Hi Nodic team

    Now I word wrong with the nrfutil to upgrade the firmware

    I want to have a look of the nrfutil log file,But I can't find that 

   so would you please tell me where is the nrfutil file

   need your help 

[zeroking5]

Now I found there is a command that can output a log file : nrfutil -o logfilename 

but the is no data output in logfile

[Bjørn Kvaale]

The nrfutil log file will be wherever you run the nrfutil -o logfilename command. If you are running it on your Desktop, it will be located on your Desktop. Which command are you currently trying to run? Just running "nrfutil -o hello.txt" will give you an "Error: Missing command."