https://devzone.nordicsemi.com/f/nordic-q-a/82179/nrf_crypto_allocator-h-no-such-file-or-directoryI am getting below error when editing dfu secure project as the baseline /nrf_crypto_allocator.h: No such file or directory the project is modified as below &lt;folder Name=&quot;Application&quot;&gt; &lt;file file_name=&quot;../dfu_public_key.c&quot; /&gt; &lt;file file_name=en-USTelligent Community 13Mon, 29 Nov 2021 12:00:32 GMThttps://devzone.nordicsemi.com/thread/341059?ContentTypeID=1Mon, 29 Nov 2021 12:00:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3077f23c-da5a-42b6-911a-7342d68242b8Muhammad Zubair<p>I need to use a dfu secure project as template.</p> <p>example code is using it.</p> <p>i solved my problem by creating a folder &quot;config&quot; in Application folder after that i put nrf_crypto_allocator.h and sdk_config.h in it</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/341051?ContentTypeID=1Mon, 29 Nov 2021 11:44:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8894d4db-9721-4aee-95b2-d5283a8bf45cEinar Thorsrud<p>Hi,</p> <p>This is a file name that is used in two nRF5 SDK examples, but not generally needed. It is needed in some cases and then&nbsp;NRF_CRYPTO_ALLOCATOR in sdk_config.h is set to 1.&nbsp;</p> <p>So the first question is why you have included it - do you need it? And secondly, if you need it and have the include path setup correctly, it should be included. If it is not found it is because your include path does not contain the location where it is, relative to your project file.</p><div style="clear:both;"></div>