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pxhl

金虫 (初入文坛)

[求助] 高斯计算时scf不收敛是怎么回事?应该怎么改? 已有2人参与

用高斯进行84个AU的优化,执行路径行为# opt b3pw91/lanl2dz geom=connectivity 。结果出错:
Restarting incremental Fock formation.
Restarting incremental Fock formation.
Restarting incremental Fock formation.
Restarting incremental Fock formation.
Restarting incremental Fock formation.
>>>>>>>>>> Convergence criterion not met.
SCF Done:  E(RB3PW91) =  -11386.1637436     A.U. after  129 cycles
             Convg  =    0.1386D-02             -V/T =  4.1395
Convergence failure -- run terminated.
Error termination via Lnk1e in /apps/chem/Gaussian/G09_B01/g09/l502.exe at Fri Oct 23 21:01:35 2015.
Job cpu time: 41 days 16 hours 29 minutes 30.5 seconds.
File lengths (MBytes):  RWF=   2810 Int=      0 D2E=      0 Chk=     53 Scr=      1
本人新手。不知道出在哪?有哪位高手可以指点一下?非常感谢!!
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白鸿明

木虫 (正式写手)

新手的话增加步长吧
高手的话,自然办法多多

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2楼2015-11-01 13:21:25
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pxhl

金虫 (初入文坛)

引用回帖:
2楼: Originally posted by 白鸿明 at 2015-11-01 13:21:25
新手的话增加步长吧
高手的话,自然办法多多

增加步长的命令是什么?增加到多少合适呢?谢谢
3楼2015-11-01 13:40:08
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小范范1989

木虫 (著名写手)

【答案】应助回帖

★ ★ ★ ★ ★ ★ ★ ★ ★ ★
感谢参与,应助指数 +1
pxhl: 金币+10, ★有帮助 2016-03-24 15:06:04
It doesn't matter how slow you are, as long as you're determined to get there, you'll get there.
4楼2015-11-01 14:36:25
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lhjms

至尊木虫 (职业作家)

增加maxcycle真没多少用,试试 scf=xqc
六欲痴缠,方唯何断?
5楼2015-11-01 16:58:18
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jimsmart

捐助贵宾 (职业作家)

【答案】应助回帖

感谢参与,应助指数 +1
如果上面的方法都不行的话,不妨增大一下内存的容量吧。
6楼2015-11-03 08:15:09
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引用回帖:
4楼: Originally posted by 小范范1989 at 2015-11-01 14:36:25
http://sobereva.com/61

谢谢分享

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7楼2015-12-01 19:31:03
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