https://devzone.nordicsemi.com/f/nordic-q-a/15310/struct-has-no-field-nrffwHas anyone else encountered a recent problem while compiling projects using mbed online compiler (error message goes &quot;Struct &quot;&quot; has no field &quot;NRFFW&quot; &quot;RF_UICR-&gt;NRFFW[0]&quot; in fstorage_config.h? I haven&#39;t changed anything in my project. IT was working onen-USTelligent Community 13Sat, 23 Jul 2016 12:54:19 GMThttps://devzone.nordicsemi.com/thread/58503?ContentTypeID=1Sat, 23 Jul 2016 12:54:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1d24b1b3-424d-47a2-936f-b9e4e7faf91fmonpetit<p>This problem is caused by the conflict between two header files &#39;nrf51.h&#39;. One is nrf51.h of mbed and another is it of nRF51822.</p> <ul> <li>/nRF51822/source/nordic_sdk/components/device/nrf51.h</li> <li>/mbed/targets/cmsis/TARGET_NORDIC/TARGET_MCU_NRF51822/nrf51.h</li> </ul> <p>The header of nRF51822 is more recent.</p> <p>Solution #1</p> <ol> <li>Delete mbed library on your project.</li> <li>Import mbed-dev library.</li> <li>Rename /mbed-dev/targets/cmsis/TARGET_NORDIC/TARGET_MCU_NRF51822/nrf51.h to other.</li> </ol> <p>Solution #2</p> <ol> <li>Export your project to offline toolchain.</li> <li>Change the include path order.</li> </ol> <p>Good luck to you.</p><div style="clear:both;"></div>