Dear Molpro users,<div><br></div><div>I am attempting to perform geometry optimizations in which the distance between the centres of mass of two groups of atoms is held at a particular value. </div><div><br></div><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div>
An example of my input file is:</div><div><br></div><div>==============</div><div><div><br></div><div>***, Allene geometry optimization using Z-Matrix</div><div>basis=3-21G</div><div><br></div><div>angstrom</div><div>Geometry={C1</div>
<div> C2,c1,1.32</div><div> h1,c1,1.08,c2,180</div><div> h2,c2,1.08,c1,180,h1,0</div><div> }</div><div>hf</div><div><br></div><div>{optg,method=slrf;</div><div> PRIMITIVE,NAME=cm1,DISSOC,group1=[C1,H1],group2=[C2,H2];</div>
<div> CONSTRAINT,VALUE=1.32,ang,cm1;</div><div>}</div></div><div><br></div><div>===============</div></div><div><br></div><div>Unfortunately, I consistently obtain the following error:</div><div><br></div><div>==============</div>
<div><div></div></div><div><div><br></div><div> PROGRAM * OPT (Geometry optimization) Authors: F. Eckert and H.-J. Werner</div><div><br></div><div> ? Error</div><div> ? Wrong atoms specification</div><div> ? The problem occurs in CONS_PARSESTR</div>
<div><br></div><div> ERROR EXIT</div><div> CURRENT STACK: MAIN</div></div><div><br></div><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div>==============</div><div></div></div><div><br></div>
<div>I am using Version 2010.1 of MOLPRO (serial compile).</div><div><br></div><div>Do I have something incorrect in my syntax, or is this feature not working in the version of Molpro I am using?</div><div><br></div><div>
Thanks in advance.</div><div><br></div><div>Brent.<br><div><br></div><div>-- <br><div>Dr Brent Walker,</div>Department of Physics and Astronomy,<br>University College London,<br>London WC1E 6BT,<div>UK.<br><br>Phone: +44 (0) 207 679 3476<br>
Fax: +44 (0) 207 679 7145<div>Email: <a href="mailto:brent.walker@ucl.ac.uk" target="_blank">brent.walker@ucl.ac.uk</a><br></div></div>
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