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2Â¥2009-03-05 18:37:55
mchen10
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¡ï ¡ï
xuefei06(½ð±Ò+2,VIP+0):thanks£¡ 3-7 00:12
xuefei06(½ð±Ò+2,VIP+0):thanks£¡ 3-7 00:12
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Several cases for l502.exe: a) Density matrix is not changing but DIIS error= 1.32D-06 CofLast= 1.18D-02. The SCF is confused. Error termination via Lnk1e in /l502.exel Solution: Problem with DIIS. Turn it off completely, e.g. using SCF=qc, or partly by using SCF=(maxconventionalcycles=N,xqc), where N is the number of steps DIIS should be used b) Convergence criterion not met. SCF Done: E(RHF) = NNNNNNN A.U. after 129 cycles [...] Convergence failure -- run terminated. Error termination via Lnk1e in /l502.exe Solution: One SCF cycle has a default of maximum 128 steps, and this was exceeded without convergence achieved. Possible solution: In the route section of input file, specify SCF=(MaxCycle=N), where N is the number of steps per SCF cycles. Alternatively, turn off DIIS (e.g. by SCF=qc) and iop(5/13=1) does work sometimes too |

3Â¥2009-03-06 00:56:26














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