<p>
        Dear developers,<br />
        <br />
        I met a error message when i used xspectra code, which is<br />
        <br />
        &nbsp;</p>
<p>
        %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%<br />
        &nbsp;&nbsp;&nbsp;&nbsp; from&nbsp; fft_dlay_set&nbsp; : error #&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2<br />
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; wrong fft dimensions<br />
        &nbsp;%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%</p>
<p>
        <br />
        &nbsp;I knew it from the reason of nr1&lt;nr1x ... However, there is no error when i changed to use the version of 4.2.1. So, could you tell me what&#39;s the problem? Or is it a bug in the new version?<br />
        <br />
        Best regards.<br />
        <br />
        Jiayu</p>