https://devzone.nordicsemi.com/f/nordic-q-a/90061/building-coap-client-projectHi, I have just started evaluating nRF52840 using the dongle and Development Kit. I have successfully tested the Openthread network using CLI project. Now I want to try out Soap client and server projects. But when I try to build Soap client, I get en-USTelligent Community 13Sat, 16 Jul 2022 23:14:04 GMThttps://devzone.nordicsemi.com/thread/377284?ContentTypeID=1Sat, 16 Jul 2022 23:14:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a42037b5-a8b1-4dc0-aa09-e098a349214ckaushalyasat<p>I think I can answer for this myself, in case someone else comes this way.</p> <p>Initially I looked at how the include file paths are specified in the nRF Connect SDK toolchain. I found this is managed through Cmake and specified in&nbsp;<span>target_include_directories</span><span>(...)</span></p> <p><span>So when I looked at the Cmake.txt in the Coap client, I saw&nbsp;</span></p> <p><span>target_include_directories</span><span>(app PUBLIC ../coap_server/interface)</span></p> <p><span>This gives the answer that we need Coap server in the same folder level as Coap client.&nbsp;</span></p> <p><span>So I created Coap Server project in the same location as my Coap client project and the problem was solved.</span></p> <p><span>Cheers,</span></p> <p><span>kaushalyasat</span></p> <p><span>&nbsp;</span></p><div style="clear:both;"></div>