Hi,
I am using Mac OS and 15.2.0 SDK on nRF52832. I was trying to do BLE DFU following this link. When I was trying to push the DFU zip file, It was resulting in the following error.

Initially, as mentioned in the Documentation, I programmed the softdevice HEX file i.e, s132 onto a dev board.
Then I tried to push the dfu test image as mentioned in step 1. It results in an error saying that the area to write isn't erased.
So, I erased the board and programmed the file from step 1. Then I reset the board and I was able to see the LED1 blinking(BSP INDICATE ADVERTISING).
Now, on nRF Connect(Desktop), when I select the device , it said that the device is not programmed.
I connected another development board and connected to that board and started scanning. The board to which I was supposed to push DFU advertised itself as Nordic Buttonless(as mentioned in the documentation).
I connected to the Nordic buttonless and I tried to push the softdevice_s132.zip file as mentioned and it resulted in the above shown error.
Why wasn't pushing the DFU from the nRFconnect Desktop app successful and what is causing theerror.
Thank you.