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乐逍遥741

金虫 (小有名气)

[求助] 高斯计算死于9999

用6-311g(d,p)进行优化Zn2Cp*,一切ok,
用6-311+g(d,p)优化失败,尝试过多种方法
其中,读Chk:
%chk=zn.chk
%mem=4gb
# B3LYP/6-311+g(d,p) opt(tight,nolinear) guess=read geom=allcheck
最后
Error termination request processed by link 9999.
Error termination via Lnk1e in /public/software/g03/g03/l9999.exe
能量振荡(如图),尝试过opt(gdiis),不见效果
轨道有问号(如图)
请问,该如何解决呢?谢谢
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乐逍遥741

金虫 (小有名气)

送鲜花一朵
乐逍遥741: 回帖置顶 2012-02-18 14:02:42
引用回帖:
: Originally posted by yjcmwgk at 2012-02-16 13:35:40:
scf=qc经常可以避免这个问题

# b3LYP/6-311+g(d) Counterpoise=2 Opt(tight,nolinear) scf=qc
结果是:
Linear equations converged to 1.217D-10 1.217D-09 after  21 iterations.
Search did not lower the energy significantly.
No lower point found -- try reversing direction.
Search did not lower the energy significantly.
No lower point found -- switch to scaled steepest descent.
Search did not lower the energy significantly.
Scaled steepest descent with Shift=0.000 failed.
Search did not lower the energy significantly.
Scaled steepest descent with Shift=0.025 failed.
Search did not lower the energy significantly.
Scaled steepest descent with Shift=0.050 failed.
Search did not lower the energy significantly.
Scaled steepest descent with Shift=0.075 failed.
Search did not lower the energy significantly.
No lower point found -- switch to steepest descent.
Search did not lower the energy significantly.
No lower point found -- run aborted.
Error termination via Lnk1e in /public/software/g03/g03/l508.exe
6楼2012-02-16 14:36:42
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nyzhaoyin

新虫 (正式写手)

【答案】应助回帖

感谢参与,应助指数 +1
乐逍遥741(金币+5): ★★★很有帮助 2012-02-16 20:10:10
maxstep=1 (默认是30)

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2楼2012-02-15 17:53:16
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nyzhaoyin

新虫 (正式写手)

如果还不收敛  结构对称的话 试试scf=nosymm
3楼2012-02-15 17:54:04
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乐逍遥741

金虫 (小有名气)

送鲜花一朵
引用回帖:
: Originally posted by nyzhaoyin at 2012-02-15 17:53:16:
maxstep=1 (默认是30)

我已按您说的投了,计算中……
另外再问您一个问题:
做BSSE时,输入为:
# b3LYP/6-311+g(d) Counterpoise=2 Opt(tight,nolinear)
结果死于:
No special actions if energy rises.
Density matrix is not changing but DIIS error= 1.22D-05 CofLast=-1.87D-03.
The SCF is confused.
Error termination via Lnk1e in /public/software/g03/g03/l502.exe at Mon Feb 13 01:34:46 2012.
请问该如何处理呢?
4楼2012-02-16 12:01:08
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