https://devzone.nordicsemi.com/f/nordic-q-a/121275/nrf54l15-mcuboot-fprotect-issueHello, I&#39;m developing for nRF54L15 the application with the NSIB + MCUBoot. I have a problem with fprotect in mcuboot returning EINVAL error. That happens due to limitation of the max protect area size in function fprotect_area in file fprotect_rramen-USTelligent Community 13Fri, 09 May 2025 08:55:10 GMThttps://devzone.nordicsemi.com/thread/534597?ContentTypeID=1Fri, 09 May 2025 08:55:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a4021c05-7e2d-4dea-a63f-546d0f60de9cMenon<p>Hello,</p> <p>For NSIB + MCUboot, I recommend using NCS version 3.0.0 or higher, as support for NSIB with the nRF54L15 is experimental in NCS versions below 3.0.0. Please refer to the <a href="https://docs.nordicsemi.com/bundle/ncs-3.0.0-preview2/page/nrf/releases_and_maturity/software_maturity.html#nrf_secure_immutable_bootloader"><em>Software Maturity Level</em> section </a>for more details.</p> <p>Could you try creating a <code>pm_static</code> file, which would allow you to manually define the sizes and addresses of the partitions? However, if you need the full 0xC00 of both S0 and S1, then creating a <code>pm_static</code> file may not be a viable solution.</p> <p>Let me know whether creating a <code>pm_static</code> file is an option for you.</p> <p>Kind regards,<br /> Abhijith</p><div style="clear:both;"></div>