Btw, seems like unassigning before assigning helps :) <br><br>TcpService &gt;&gt; start<br>    self verifyOkToStart ifFalse: [^self].<br>    self unassignPort.                             &quot;This line is new!&quot;<br>    self assignPort.<br>

    [super start] on: Error do: <br>        [ :ex | self unassignPort. ex pass]<br><br>Though I&#39;m not sure it will not have some bad consequences in some other place...<br><br>-- <br>Dennis Schetinin<br>