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<TITLE>Is UMP2 geometry optimization possible?</TITLE>
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<P><FONT SIZE=2 FACE="Arial">Dear Colleagues,</FONT>
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<P><FONT SIZE=2 FACE="Arial">While UMP2 energy seems to work with molpro2002.6, the geometry optimization with OPTG or OPTMP2 all failed. By checking optgeo.f, it seems that UMP2 is not included for OPTG. I am wondering if anyone has experience or a simple solution to solve the geometry optimization with UMP2? It seems by modifying the source code of optgeo.f one would be able to do numerical optimization. Before we attempt this possibility, I am writing to see, to be "safe", if anyone has a good suggestion about what to change in the code?</FONT></P>
<P><FONT SIZE=2 FACE="Arial">Thanks a lot!</FONT>
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<P><FONT SIZE=2 FACE="Arial">Best wishes to all,</FONT>
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<P><FONT SIZE=2 FACE="Arial">Jun Li</FONT>
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