"NotAvailableBecauseProtection" when attempting to flash nRF54L15

RE: "NotAvailableBecauseProtection" when attempting to flash nRF54L15

Amanda Hsieh — Thu, 24 Jul 2025 13:19:05 GMT

This can happen automatically after certain operations, such as a reset or power cycle, if the firmware does not explicitly disable the protection on startup, or if protection settings are enabled in the build configuration. When this protection is active, attempts to flash or debug the device will fail with errors indicating that access is not available due to protection. The solution is to use the west flash --recover command (or equivalent recovery commands), which erases the device and disables the protection, restoring access for flashing and debugging. See Programming and Debugging (nrf54l15dk).

RE: "NotAvailableBecauseProtection" when attempting to flash nRF54L15

Terence Kim — Wed, 23 Jul 2025 18:06:36 GMT

Thanks, Amanda. As to my first question, how would the device have entered this state?

RE: "NotAvailableBecauseProtection" when attempting to flash nRF54L15

Amanda Hsieh — Wed, 23 Jul 2025 13:44:48 GMT

Hi,

As the log indicated, the board is under AP protection status and needs to run "west flash --recover" to unlock the board. If you are using VS Code, you can check here.

Regards,
Amanda H.