https://devzone.nordicsemi.com/f/nordic-q-a/73993/build-failed-issueHi guys, I created an example for Mesh SDK where I defined my own header files. I called those header files in appropriate C files and tried to build and run a code but then an issue occurred. I am not able to build the solution and there is alwaysen-USTelligent Community 13Mon, 19 Apr 2021 10:53:32 GMThttps://devzone.nordicsemi.com/thread/305495?ContentTypeID=1Mon, 19 Apr 2021 10:53:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dfa38d2e-95cb-4bff-8428-1434a34de4f6Aduka_27<p>Hi Mttrinh,</p> <p>I solved the issue by defining the variables as&nbsp;<strong>extern&nbsp;</strong>ones. Thanks anyway for the response.</p> <p>Br,</p> <p>Adnan.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/305489?ContentTypeID=1Mon, 19 Apr 2021 10:39:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:39bb7db1-8ffd-4891-babe-e18f4b3c445eMttrinh<p>Hi,</p> [quote user=""]I created an example for Mesh SDK where I defined my own header files.[/quote] <p>What do you meant by &quot;created an example for Mesh SDK&quot;? Have you created your own application from scratch? Have you modified one of our examples?&nbsp;</p> <p>There seems to be something wrong regarding your header files. Have you&nbsp;added the path to your header files in your project?</p><div style="clear:both;"></div>