AMBER Archive (2000)

Subject: Re: NMODE

From: Todd J. Minehardt (tjm_at_Princeton.EDU)
Date: Thu Sep 14 2000 - 09:13:49 CDT


your problem is that you are losing precision by writing out the final coordinates
in formatted form, i.e., ntxo = 1 (default)....change this to ntxo = 0, then for
your second run where you do eigensystem analysis, set ntx = 0

tjm

On Thu, 14 Sep 2000, Tuomo Laitinen wrote:

> Hello!
>
> I have problems between Newton-Raphson minimization and normal mode
> calculation of a complex (AMBER6). The reseptor has 189 residues so
> its a big calculation, but it is possible to do. I have computed
> normal modes for a reseptor and substrate but I have big broblems
> with the complex. After Newton-Raphson (ntrun=4) the normal mode
> calculation (ntmin=1) does not understand the restart file properly
> and it complains about too big RMS gradient which I just had
> minimized. I have tried almost everything exept sledgehammer.......
>
> yours
> tl
>

-- 
Todd J. Minehardt (tjm_at_princeton.edu)
Department of Chemistry
Princeton University
Princeton, NJ 08544-1009
Phone: 609.258.1932
Fax: 609.258.6746