Flash download failed - "Cortex-M4"

[SergeyP]

I successfully used my nrf52DK with latest production SD 132 and latest SDK (12.2.0), everything is on latest Keil v5. Then I needed to program another board (nRF51 Dongle) by using the same Keil, I failed with that and eventually wanted to switch back to my nrf52DK but I am no longer able to program the board by using the same project which was used prior to the Dongle "exercise" now my attempt to load the program results in

so I went to Options->Debug->Settings combobox and saw there ULINK2/ME Cortext Debugger, I don't think I explicitly made change there, seems like that setting was somehow got corrupted from my previous experiments with the Dongle. So I changed that value to J-Link/J-Trace Cortext but now my attempt to Load results in:

These are my settings:

Why did this issue started appearing and how to fix it? And would also be good to figure out how to avoid such problems in future.

[Edit/Addition] This is the target settings for the Dongle:

This is the Debug settings for the Dongle:

And this Target for the nrf52DK:

And this is Debug for the nrf52DK:

[SergeyP]

I am using the sample from nRF5_SDK_12.2.0_f012efa\examples\ble_peripheral\ble_app_template\nRF5_SDK_12.2.0_f012efa\examples\ble_peripheral\ble_app_template\pca10040\s132\arm5_no_packs, it uses Soft Device and my DK is loaded with that (S132) softdevice. The project worked with no problems, the problems started appearing AFTER I opened and tried to use (with my NRF51 Dongle) the project from nRF5_SDK_12.2.0_f012efa\examples\ble_peripheral\ble_app_template\pca10028\s130\arm5_no_packs

which is also leveraging SD but another one, so, once I returned to the first project (for 10040) it started producing those symptoms I described in the question. Now I looked into another example and coplied IROM1, IRAM1 settings from there to be 0x1F000/0x61000 0x20002128/0xDED8 My project can now be loaded into the device, the problem is fixed. Thank you.