<div dir="ltr">Dear Grant,<div><br><div><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
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The answer to your question depends on what type of multi calculation you would like to run. Do you wish to run a full valence CAS to attempt to identify the lowest state, or do you want a single CSF to ‘mimic’ a HF calculation?<br></blockquote><div><br></div><div>From this suggestion (I can't find Kirk's post):</div><div><br></div><div><a href="http://www.molpro.net/pipermail/molpro-user/2013-May/005384.html">http://www.molpro.net/pipermail/molpro-user/2013-May/005384.html</a><br></div><div><br></div><div>Probably what I need is a single CSF. What do you think?</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
One way of determining the active space (via occ and closed cards) is to use the output from one of your failed calculations - you should see a section such as:<br>
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NUMBER OF CORE ORBITALS: 25 ( 15A' + 10A" )<br>
NUMBER OF VALENCE ORBITALS: 112 ( 61A' + 51A” )<br>
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Which should inform you that a full valence active space would have occ,76,61 and closed 15,10. This is obviously a huge active space and probably not what you want.<br></blockquote><div><br></div><div>Thanks, it is rather clear now. </div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
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However, are you sure that you want the wave function symmetry to be 1 (i.e., A’)? I haven’t given it much thought, but it’s possible that this system is A”.<br><br></blockquote><div>I performed calculation with same structure and basis set using Gaussian, it identifies the state as A', so I use same state as input for molpro. Can it be different? Your help is much appreciated.</div><div><br></div><div>Best regards,</div><div><br></div><div>Aulia</div><div> </div><div><br></div></div></div></div></div></div>