<div dir="ltr">Maybe you could try turning symmetry off. Then your states will all have the same symmetry and will be ordered according to energy. Then you could ask to compute the coupling between 1.1 and whatever 2.6 ends up becoming (which you should be able to readily identify since its energy should stay the same whether symm is on or off).<div>
<br></div><div>The only issue is that with symmetry turned off the calculation will take longer. I don't have enough experience to estimate how much longer, but at least you should be able to get the coupling that you want.</div>
<div><br></div><div>As for your second question - I'm assuming you are doing an MCSCF/MULTI calc. If so, it sounds like you are not utilizing the distinction between closed and frozen. Frozen means always doubly occupied + no orbital optimization. Closed means always doubly occupied + orbital optimization. I've calculated derivative couplings with a combination of the <u>occ</u> and <u>closed</u> cards to limit the size of the active space. For more details see the 2012.1 manual - sections 19.2.2 and 19.2.3. It's pretty clear in there. </div>
<div><br></div><div>Hopefully my suggestions work.</div><div><br>~Alan Chien</div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Jun 25, 2014 at 6:06 AM, Rameswar Bhattacharjee <span dir="ltr"><<a href="mailto:rameswarb22@gmail.com" target="_blank">rameswarb22@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div>Hi,<br></div>I am trying to calculate the derivative coupling between two states namely 1.1 and 2.6. The programs terminates with a message "Non-adiabatic coupling only for same state symmetry". Is there a way, I can calculate the derivative coupling between states of different symmetry in MOLPnon-adiabatic coupling can be calculated between states of the same symmetryRO. <br>
<br></div>Also, the derivative coupling program does not allow defining frozen/core orbitals (comment: kraft: no frozen core possible with SA_MC) which leads to a very large occupied space for heavy molecules like Ge3H3 requiring large memory. Is there a way, we can choose the important (active) orbitals and then do a derivative coupling between states of different symmetry?<br>
<br></div>Thanking You<span class="HOEnZb"><font color="#888888"><br><br><br clear="all"><div><div><div><div><br>-- <br><div dir="ltr"><div><font face="times new roman, new york, times, serif" size="4">---------------------------------------------------------------------------------------------</font><b><font face="times new roman, new york, times, serif" size="4"><br>
"The man who makes no
mistakes does not usually make anything."</font></b></div><div><b><font face="times new
roman, new york, times, serif" size="4">
Edward John Phelps (1822-1900)</font></b></div><div><font face="times new roman, new
york, times, serif" size="4">---------------------------------------------------------------------------------------------<br><br>Rameswar Bhattacharjee<br>Junior Research Fellow<br>Dept. of Spectroscopy<br>Indian Association for the Cultivation of Science<br>
Jadavpur, Kolkata-32<br><br>
</font></div></div>
</div></div></div></div></font></span></div>
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