Thanks for the suggestion. But I still get the same error?? <br>I just modified the last input to<br><i>{optg;root,2;active,q1h1,q1h2}</i> with elimination of q1h3 in the geometry input as well.<br><br><div class="gmail_quote">
On Thu, Mar 19, 2009 at 4:35 AM, Terry Frankcombe <span dir="ltr"><<a href="mailto:tjf@rsc.anu.edu.au">tjf@rsc.anu.edu.au</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="im"><br>
> This error can also happen in geometry optimizations that specify<br>
> symmetry-breaking internal coordinates in terms of active variables<br>
<br>
</div><div class="im">> {optg;root,2;active,q1h1,q1h2,q1h3}<br>
<br>
<br>
</div>Your geometry is C2v. Including q1h2 and q1h3 independently breaks<br>
symmetry. Using one variable for both distances will maintain C2v.<br>
<br>
<br>
<br>
<br>
</blockquote></div><br><br clear="all"><br>-- <br>Jayashree<br>