analytic 2nds not ready for Becke-97D XC functionals

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Surinder,
NWChem 6.3 does not have analytic frequencies for the becke97-d functional, therefore you would have to run numerical frequencies, instead, by supplying the following task line
task dft frequencies numerical

The good news is that Tobias Ristahus has recently contributed some lines of code that now allow NWChem to compute analytical frequencies for the Becke 97 style functional ( becke97-d included). This functionality is part of the
development version that you can download from

http://www.nwchem-sw.org/download.php?f=Nwchem-src-2013-11-12.tar.gz

Cheers, Edo


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