https://devzone.nordicsemi.com/f/nordic-q-a/25285/gdb---new-thread-57005Some times when I&#39;m trying to use GDB it stop with the following information: (gdb) file _build/nrf51822_xxab.out A program is being debugged already. Are you sure you want to change the file? (y or n) y Load new symbol table from &quot;_build/nrf51822_xxaben-USTelligent Community 13Tue, 19 Sep 2017 09:11:52 GMThttps://devzone.nordicsemi.com/thread/99629?ContentTypeID=1Tue, 19 Sep 2017 09:11:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:563c68e9-36dc-46eb-8808-86e99573a75aJ&#248;rgen Holmefjord<p>It looks like you are spawning multiple threads. Can you check the output of <code>info threads</code> command?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/99631?ContentTypeID=1Mon, 18 Sep 2017 22:46:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8c97aabb-f2da-4be8-9aff-b20f5ba8a9caJose Xavier<p>Sorry, I edit my question. The problem is that it stuck at [New Thread 57005]</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/99630?ContentTypeID=1Mon, 18 Sep 2017 22:12:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7c7cd274-f049-485e-a018-ec5316fb5a29RK<p>is there an actual question? You&#39;re telling gdb to use a new file and it&#39;s telling you the things it tells everyone when they change files during a debug.</p><div style="clear:both;"></div>