download application error

[dnguyen2019]

Hi 

configure as:

ROM start: 0x26000

RAM start: 0x20002218

when I download application software , it pops up following error. 

I'm using keil uVison version 5.

[superpak]

I think this error comes up when you already have a SoftDevice present on your the board you are flashing to. You can use nrfjprog to erase the board completely and then download the code again.

[dnguyen2019]

Is it possible someone come here to support me for a day?