https://devzone.nordicsemi.com/f/nordic-q-a/6289/gdb-programming-verify-errorHi, I have troubles programming my blinky in a nRF51DK. I have S110 v8 loaded and can flash blinky with nrfStudio. Not with GDB. It seems that the flash is not erased. After programming with studio gdb gdb reports verify ok. Blinky starts at 0x18000en-USTelligent Community 13Tue, 31 Mar 2015 17:48:22 GMThttps://devzone.nordicsemi.com/thread/21968?ContentTypeID=1Tue, 31 Mar 2015 17:48:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:793209a0-543c-4a7e-923a-fb78431fd374Dig Kleppe<p>It helped a lot! In fact changing the CPU from Cortex-M0 to nrf51 did it. I should have read the Segger doc about the supported devices a bit longer... Thanks!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/21967?ContentTypeID=1Tue, 31 Mar 2015 12:52:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3fc287ac-7f2f-4f25-b2a0-662eaeba66a8Stian R&#248;ed Hafskjold<p>I tried running JLinkGDBServer with the flags <code>-select USB -device nrf51 -if SWD</code> in linux with the arm-none-eabi-gdb, and it seems to work. My .gdbinit that is loaded with the arm-none-eabi-gdb looks like this:</p> <pre><code>target remote localhost:2331 monitor endian little monitor speed 1000 monitor reset monitor sleep 100 monitor speed 2000 monitor flash device = nrf51 load break main continue </code></pre> <p>I don&#39;t know if this helps.</p> <p>I haven&#39;t tried this in windows though. Can try to set it up there if you still struggle.</p><div style="clear:both;"></div>