Hello
Then, I programmed the softdevice (s140_nrf52_7.0.1_softdevice.hex) via the command "make flash_softdevice".
And finally, I sent the update (nrfutil dfu serial -pkg test_package.zip -p COM6 -b 115200 -fc 0)
For example :
- examples \ ble_peripheral \ ble_app_hrs \ pca10056 \ s140 \ ses \ Output \ Release \ Exe \ ble_app_hrs_pca10056_s140.hex: everything works fine
- examples \ multiprotocol \ ble_thread \ ble_thread_dyn_hrs_coap_srv_freertos \ hex \ nrf52840_xxaa_s140_pca10056.hex: after it has successfully updated the program crashes
To debug this problem, I sent the firmware of the example ble_thread_dyn_hrs_coap_srv_freertos_pca10059_s140 (in debug mode) and after the update I started the debugger (Attach Debugger):

The program cannot pass the line "otInstanceInitSingle ();"
Next, if I continue the test, I have this error: Data bus error (return address in the stack frame is not related to the instruction that caused the error)

Also, do you know how I can debug this kind of problem?