unable to flash the code in BT 40

[lalith88]

C:\Users\lnaik\Desktop\New_develop>nrfjprog --recover --coprocessor CP_NETWORK
Recovering device. This operation might take 30s.
[error] [ Client] - Encountered error -21: Command recover executed for 14 milliseconds with result -21
[error] [ Worker] - Eraseprotect is enabled and readback protection setting is ALL, can't recover device.
ERROR: Recover failed. Please make sure that the correct device family is given
ERROR: and try again.
NOTE: For additional output, try running again with logging enabled (--log).
NOTE: Any generated log error messages will be displayed. 
i think this is the major issue  i am facing could not able to recovery the board 

and i am not able get the log details with --log 

i had created the before also one ticket related to this but it has closed with our resolving the issue 
i hope you will give quick replay 

[lalith88]

-- west flash: using runner nrfjprog
-- runners.nrfjprog: Flashing file: c:\Users\lnaik\Desktop\New_develop\build_1\zephyr\merged.hex
[error] [ Worker] - Encountered unexpected debug port ID 4, expected 6
[error] [ Client] - Encountered error -5: Command select_coprocessor executed for 22 milliseconds with result -5
ERROR: Failed when selecting coprocessor APPLICATION
ERROR: The --family option given with the command (or the default from
ERROR: nrfjprog.ini) does not match the device connected.
NOTE: For additional output, try running again with logging enabled (--log).
NOTE: Any generated log error messages will be displayed.
FATAL ERROR: command exited with status 18: nrfjprog --program 'c:\Users\lnaik\Desktop\New_develop\build_1\zephyr\merged.hex' --sectorerase --verify -f NRF53 --coprocessor CP_APPLICATION --snr 1050060012
now i am getting this error 

[lalith88]

-- west flash: using runner nrfjprog
-- runners.nrfjprog: Flashing file: c:\Users\lnaik\Desktop\New_develop\build_1\zephyr\merged.hex
[error] [ Worker] - Encountered unexpected debug port ID 4, expected 6
[error] [ Client] - Encountered error -5: Command select_coprocessor executed for 22 milliseconds with result -5
ERROR: Failed when selecting coprocessor APPLICATION
ERROR: The --family option given with the command (or the default from
ERROR: nrfjprog.ini) does not match the device connected.
NOTE: For additional output, try running again with logging enabled (--log).
NOTE: Any generated log error messages will be displayed.
FATAL ERROR: command exited with status 18: nrfjprog --program 'c:\Users\lnaik\Desktop\New_develop\build_1\zephyr\merged.hex' --sectorerase --verify -f NRF53 --coprocessor CP_APPLICATION --snr 1050060012 can you check this error