how to use nrfjprog to readcode?I have an error as pic below

[liujirong888]

Hi expert,

       how to use nrfjprog to readcode?I  have an error as pic below:

and how to seperate readback application and softdevice?

[Jørgen Holmefjord]

Which device are you trying to read? I'm not getting any error using the first command on my PCA10040 board (nRF52-DK).. The second command is missing file parameter where you want to store the read code. 

[liujirong888]

I use PCA10040,but why when I use "nrfjprog --readuicr soft.uicr" there is error

--readcode also have error why？