ss="keyword">if</span> fid == -1
0095             <span class="comment">% file cannot be read, try to read the file in prefdir</span>
0096             file_name = fullfile(prefdir, fname);
0097             fid = fopen(file_name, <span class="string">'rt'</span>);
0098             <span class="keyword">if</span> fid == -1
0099                 string = <span class="string">''</span>;
0100                 <span class="keyword">return</span>
0101             <span class="keyword">end</span>
0102         <span c