https://devzone.nordicsemi.com/f/nordic-q-a/51550/sdk13-0-0-dfu-debugI built ...\examples\dfu\bootloader_secure\secure_dfu.eww ,pass,then when download to PCA10040 board to debug,but it show error&quot; ELF/DWARF Error: Unsupported .debug_info format version:4 &quot; ,what&#39;s the problem?en-USTelligent Community 13Thu, 29 Aug 2019 11:28:35 GMThttps://devzone.nordicsemi.com/thread/206843?ContentTypeID=1Thu, 29 Aug 2019 11:28:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:91dd756b-e737-4ff1-9177-c64bc1b26264jwx<p>I use iar,don&#39;t see makefile,can you tell me the path?thanks!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/206842?ContentTypeID=1Thu, 29 Aug 2019 11:24:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d1b89175-6190-4d4e-9331-55a662a169bc&#216;yvind<p>Hello,&nbsp;<br /><br /></p> <p></p> [quote user=""]ELF/DWARF Error: Unsupported .debug_info format version:4[/quote] <p>&nbsp;This indicates an issue with debug settings that have been fixed after SDK v13.0.&nbsp;In your Makefile, please find the following line<br /><pre class="ui-code" data-mode="c_cpp">CFLAGS += -Wall -Werror -Os -g3</pre><br />And remove -g3. This should solve the issue.&nbsp;<br /><br />Kind regards,<br />Øyvind</p><div style="clear:both;"></div>