&nbsp;&nbsp;<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=label>otherwise</span><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=error>error</span>(<span class=quotes>'Supply&nbsp;RootDir&nbsp;and&nbsp;CmdLine&nbsp;to&nbsp;"xtal_rootdir.m".'</span>);<br>
&nbsp;&nbsp;&nbsp;<span class=keyword>end</span>&nbsp;&nbsp;&nbsp;&nbsp;<br>
&nbsp;&nbsp;&nbsp;<br>
&nbsp;&nbsp;&nbsp;<span class=keyword>if</span>&nbsp;~<span class=stack>exist</span>(RootDir)<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span 