verification failed

[leo_lu]

I was able to connect to com port, but now I face with Verification Failed.

[leo_lu]

2025-08-08T07:54:05.482Z INFO Initialising the bundled nrfutil device
2025-08-08T07:54:05.488Z DEBUG Started watching devices
2025-08-08T07:54:07.444Z INFO Using the bundled core version for nrfutil device: 8.1.0
2025-08-08T07:54:07.484Z INFO Using nrfutil-device version: 2.10.2
2025-08-08T07:54:07.484Z INFO Using nrf-device-lib version: 0.17.71
2025-08-08T07:54:07.484Z INFO Using nrf-probe version: 0.38.0
2025-08-08T07:54:07.484Z INFO Using JLink version: JLink_V8.56a
2025-08-08T07:54:07.485Z INFO Your version of SEGGER J-Link (8.56a) is newer than the one this app was tested with (8.18). The tested version is not required, and your J-Link version will most likely work fine. If you get issues related to J-Link with your devices, use the tested version.
2025-08-08T07:54:08.484Z DEBUG Selected device: nRF9160 DK
2025-08-08T07:54:08.513Z DEBUG Changed step: Info
2025-08-08T07:54:10.260Z DEBUG Changed step: Rename
2025-08-08T07:54:11.144Z DEBUG Changed step: Program
2025-08-08T07:54:49.708Z DEBUG Changed step: Verify
2025-08-08T07:54:52.715Z INFO Opened port with options: {"path":"COM9","baudRate":115200}
2025-08-08T07:54:54.716Z ERROR Received ERROR as return value from AT command
2025-08-08T07:54:54.724Z INFO Closed port: COM9
2025-08-08T07:54:57.537Z INFO Opened port with options: {"path":"COM9","baudRate":115200}
2025-08-08T07:54:59.550Z ERROR Received ERROR as return value from AT command
2025-08-08T07:54:59.552Z INFO Closed port: COM9

[Juha Y]

Hi,

Please check that the COM port is not reserved by another application like terminal emulator.

BR,

Juha

[leo_lu]

Hi Juha,
I found out that I can verify successfully after programming Asset Tracking and Shell Command Line Interface, but I failed to verify after programming AT Commands, how can I fix that?
I just want to use at+cfun=4 and at+cfun=1 to control the model to connect to the network emulator, what should I do now?

Regards
Leo