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<b class="strong">Note about Knopflerfish</b><br/>
<p>By default, Knopflerfish does not allow getting a service during its unregistration. So, to allow this, launch the Knopflerfish framework with the <em>-Dorg.knopflerfish.servicereference.valid.during.unregistering=true</em> property. You can add this property in the <em>props.xargs</em> file</p>
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