Hi everyone,

I've been running a full_analysis script with relaxation data at two fields 
(600 and 900MHz). The calculations with models I to IV run successfully. 
However, the ellipsoid model does not converge even after 7 rounds and more 
than one week of calculation time.

I checked the mailing list and found one similar situation that happened to 
Sebastien (October 24, 2007. Vol.17 issue 8 ... Extremely long optimization 
times). I followed the suggestion by Edward in order to change the minimization 
protocol from "newton" to "simplex". The result is that after two weeks and 27 
rounds the model ellipsoid still does not converge, and with each next round 
the minimization becomes slower and slower.

The protein is an homodimer of 36KDa. For the model free analysis I'm using the 
pdb structure of the monomer (18KDa), and I might have wrong assigned 
resonances.

I'm running relax 1.3.4 on 2 cores Intel(R) Core(TM)2 CPU,  6600 @ 2.4GHz, 4M 
cache, and 4G ram.

Do you have any idea?. I'll appreciate any suggestion to follow with the 
analysis.

Thanks

Daniel

Dr. Daniel Pérez
Institut für Molekularbiologie und Biophysik
Schafmattstrasse 20
ETH-Hönggerberg, HPK G 5
CH-8093 Zürich
Phone: +41 44 633 25 37
E-mail: [email protected]
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