OLDSIGMA — Superseded by TRUSTG.
SIGMA performed a geometry optimization to minimize the gradient is performed using the McIver-Komornicki method. In AMPAC 7, SIGMA was depreciated but could still be accessed using OLDSIGMA. Now in AMPAC 8, OLDSIGMA is no longer supported and will cause the job to exit. Either TRUSTG, LTRD, or TS should be used in place of SIGMA or OLDSIGMA.
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