https://devzone.nordicsemi.com/f/nordic-q-a/9313/launching-myapplication-default-has-encountered-a-problemHi! (I moved this question to the &quot;Questions&quot; area from another area.) I am using Eclipse to develop and debug on nRF51 DMs (PCA 10028). I have managed to run and debog on one DM, but when I remove the card, add another one, create a new Debug configurationen-USTelligent Community 13Tue, 22 Sep 2015 07:12:23 GMThttps://devzone.nordicsemi.com/thread/34378?ContentTypeID=1Tue, 22 Sep 2015 07:12:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f877adae-5567-4cc7-b15a-42ab80bd16f4Stian R&#248;ed Hafskjold<p>Thank you for answering your own question!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/34377?ContentTypeID=1Fri, 18 Sep 2015 09:33:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0587a553-0968-40ee-ad11-6a1bee542665Elm<p>Hi,</p> <p>I found an answer to my own problem: In the Run -&gt; Debug configurations... -&gt; GDB SEGGER J-Link Debugging -&gt; myApplication Default -&gt; Debugger tab, under GDB Client setup, the path to the executable is:</p> <pre><code> ${cross_prefix}gdb${cross_suffix} </code></pre> <p>I pressed the Variables... button and defined cross_prefix to be &quot;arm-none-eabi-&quot;.</p> <p>This works for me. I do not understand,, however, why this cvariable is not needed for my first project, but needed on my second one.</p> <p>Elk</p><div style="clear:both;"></div>