From owner-chemistry -8 at 8- ccl.net Thu Jul 7 08:21:00 2011 From: "Eliac Brown Eliacbrown%yahoo.com" To: CCL Subject: CCL: SCF - Algorithm Message-Id: <-45042-110707081712-17993-WLKTcWMloimdmWILcHdCGA() server.ccl.net> X-Original-From: "Eliac Brown" Date: Thu, 7 Jul 2011 08:17:09 -0400 Sent to CCL by: "Eliac Brown" [Eliacbrown{}yahoo.com] Dear CCL During optimization and single point energy, some of the studied complexes suffered from SCF-Confused error. So, different SCF algorithms were used. I was wondering, energies of the optimized complexes using different SCF algorithms are comparable? If not, what kind of correction could be used? One more question, please, for some complexes, it gives DIIS SCF confused, so I changed the SCF algorithm into fermi (SCF=(Fermi)). But I got the same error "DIIS SCF confused". Why it is still calling the algorithm DIIS? Is that a bug? Thanks in advance Eliac