Author Topic: -ex statpt, large gradient, small energy, no convergence  (Read 3716 times)

jbaltrus

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-ex statpt, large gradient, small energy, no convergence
« on: May 19, 2010, 07:40:02 pm »
I will give this problem a chance on the forum.

I have this floppy system (or is it?..) that I optimize in excited state. It would not converge since gradient is large while energy is negligible. In fact, I am getting this problem in most of the molecules I work with, but only in excited state optimization and not in ground state optimization.

Is there anything I am missing or can tweak to get it optimized? I have been offered to get rid of hessaprox already since I start with the converged ground state geometry, I do not know if that will affect convergence, though

thanks

Jonas

$convinfo
 energy change  : actual value =  -0.2001E-09 threshold =   0.1000E-05
 geom. gradient : actual value =   0.2354E-01 threshold =   0.1000E-03
$convergence not reached

jbaltrus

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Re: -ex statpt, large gradient, small energy, no convergence
« Reply #1 on: May 19, 2010, 07:40:40 pm »
this is exactly the problem that Beverly in one post below has