https://devzone.nordicsemi.com/f/nordic-q-a/6313/master-control-panel-3-8-0-7-fails-to-search-devicesHi, After i flashed the firmware MEFW nRF58122 0.11.0, MCP &quot;start discovery&quot; button is disabled. I flashed the lower version MEFW nRF58122 0.9.0. Same issue. There is exception after &quot;Failed to import BleDfu&quot; with Python exception in the log file.en-USTelligent Community 13Tue, 31 Mar 2015 13:53:28 GMThttps://devzone.nordicsemi.com/thread/22026?ContentTypeID=1Tue, 31 Mar 2015 13:53:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:162972b4-ff35-4090-a1a5-ec7b59ccbf94Stian R&#248;ed Hafskjold<p>The script that fails is the <em>script.py</em> in the lib folder of MCP. It tries to import the <em>MasterEmulator.dll</em>. I tried to remove this dll file, and got the exact same error log. Are you sure that the Master Emulator that came with the MCP install got successfully installed? The dll should be located in the &quot;C:\Program Files (x86)\Nordic Semiconductor\Master Emulator\2.1.11.7&quot; folder. Try to reinstall MCP.</p><div style="clear:both;"></div>