From owner-chemistry@ccl.net Tue May 20 05:12:01 2014 From: "Georg Lefkidis lefkidis:-:physik.uni-kl.de" To: CCL Subject: CCL: increasing MAXIT in GAMESS Message-Id: <-50095-140520045959-15629-YdLAKeclsz81pc6UEe4i3A .. server.ccl.net> X-Original-From: "Georg Lefkidis" Content-Language: de Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="US-ASCII" Date: Tue, 20 May 2014 10:59:49 +0200 MIME-Version: 1.0 Sent to CCL by: "Georg Lefkidis" [lefkidis,+,physik.uni-kl.de] Dear all, I am trying to run a calculation on a heavily correlated cluster, which, however, already fails at the SCF level. After playing along with damping and level shifting, I believe that it now is converging (the energy decreases smoothly). However the maximal value MAXIT=200 is probably not enough since it does not actually reach convergence. I believe that further iterations might be necessary. Is there a way to increase this? I remember once reading that GAMESS must be recompiled with some value changed, but I do not know anymore..... Any help would be heavily appreciated. Best regards George Lefkidis ------------------------------------------------------------------- Dr. Georg Lefkidis Dept. of Physics University of Kaiserslautern PO Box 3049 67653 Kaiserslautern e-mail: lefkidis(at)physik(dot)uni(dash)kl(dot)de Tel.: +49 631 205 3207 ------------------------------------------------------------------- From owner-chemistry@ccl.net Tue May 20 07:50:00 2014 From: "Yang Guo guoyang0123{=}gmail.com" To: CCL Subject: CCL: increasing MAXIT in GAMESS Message-Id: <-50096-140520073934-19168-jnjn5afkBRYy4lU3AjrqzQ(~)server.ccl.net> X-Original-From: Yang Guo Content-Type: multipart/alternative; boundary=f46d0438921b1cc13b04f9d355b8 Date: Tue, 20 May 2014 19:39:28 +0800 MIME-Version: 1.0 Sent to CCL by: Yang Guo [guoyang0123=-=gmail.com] --f46d0438921b1cc13b04f9d355b8 Content-Type: text/plain; charset=UTF-8 > From .dat file, you can find the MOs in $VEC section. Copy them to the input file, and add the keyword: MOREAD (details can be found in manual). You can employ the failed SCF MOs as the initial guess of a new calculation. 2014-05-20 16:59 GMT+08:00 Georg Lefkidis lefkidis:-:physik.uni-kl.de < owner-chemistry*_*ccl.net>: > > Sent to CCL by: "Georg Lefkidis" [lefkidis,+,physik.uni-kl.de] > Dear all, > > I am trying to run a calculation on a heavily correlated cluster, which, > however, already fails at the SCF level. After playing along with damping > and level shifting, I believe that it now is converging (the energy > decreases smoothly). However the maximal value MAXIT=200 is probably not > enough since it does not actually reach convergence. I believe that further > iterations might be necessary. Is there a way to increase this? I remember > once reading that GAMESS must be recompiled with some value changed, but I > do not know anymore..... > > Any help would be heavily appreciated. > > Best regards > George Lefkidis > > > ------------------------------------------------------------------- > Dr. Georg Lefkidis > Dept. of Physics > University of Kaiserslautern > PO Box 3049 > 67653 Kaiserslautern > e-mail: lefkidis(at)physik(dot)uni(dash)kl(dot)de > Tel.: +49 631 205 3207 > -------------------------------------------------------------------> > > --f46d0438921b1cc13b04f9d355b8 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
From .dat =C2=A0file, you can find the MOs in $VEC section= . Copy them to the input file, and add the keyword: MOREAD (details can be = found in manual). You can employ the failed SCF MOs as the initial guess of= a new calculation.=C2=A0


2014-05-20 16= :59 GMT+08:00 Georg Lefkidis lefkidis:-:physik.uni-kl.de <owner-chemistry*_*ccl.net>:

Sent to CCL by: "Georg Lefkidis" [lefkidis,+,physik.uni-kl.de]
Dear all,

I am trying to run a calculation on a heavily correlated cluster, which, however, already fails at the SCF level. After playing along with damping and level shifting, I believe that it now is converging (the energy
decreases smoothly). However the maximal value MAXIT=3D200 is probably not<= br> enough since it does not actually reach convergence. I believe that further=
iterations might be necessary. Is there a way to increase this? I remember<= br> once reading that GAMESS must be recompiled with some value changed, but I<= br> do not know anymore.....

Any help would be heavily appreciated.

Best regards
George Lefkidis


-------------------------------------------------------------------
Dr. Georg Lefkidis
Dept. of Physics
University of Kaiserslautern
PO Box 3049
67653 Kaiserslautern
e-mail: lefkidis(at)physik(dot)uni(dash)kl(dot)de
Tel.: +49 = 631 205 3207
-------------------------------------------------------------------



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--f46d0438921b1cc13b04f9d355b8-- From owner-chemistry@ccl.net Tue May 20 08:24:00 2014 From: "Visvaldas K. coyote_v2002=-=yahoo.com" To: CCL Subject: CCL: increasing MAXIT in GAMESS Message-Id: <-50097-140520082147-11637-0JmAIz969NwWaNOyo3GRzw#,#server.ccl.net> X-Original-From: "Visvaldas K." Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=iso-8859-1 Date: Tue, 20 May 2014 05:21:41 -0700 (PDT) MIME-Version: 1.0 Sent to CCL by: "Visvaldas K." [coyote_v2002,yahoo.com] -------------------------------------------- On Tue, 5/20/14, Georg Lefkidis lefkidis:-:physik.uni-kl.de wrote: Subject: CCL: increasing MAXIT in GAMESS To: "Kairys, Visvaldas " Date: Tuesday, May 20, 2014, 4:59 AM Could taking the final vectors from a long run and submitting them into a new run with $GUESS GUESS=MOREAD $END be a workaround to get more iterations? Best, Vis Kairys Sent to CCL by: "Georg Lefkidis" [lefkidis,+,physik.uni-kl.de] Dear all, I am trying to run a calculation on a heavily correlated cluster, which, however, already fails at the SCF level. After playing along with damping and level shifting, I believe that it now is converging (the energy decreases smoothly). However the maximal value MAXIT=200 is probably not enough since it does not actually reach convergence. I believe that further iterations might be necessary. Is there a way to increase this? I remember once reading that GAMESS must be recompiled with some value changed, but I do not know anymore..... Any help would be heavily appreciated. Best regards George Lefkidis ------------------------------------------------------------------- Dr. Georg Lefkidis Dept. of Physics University of Kaiserslautern PO Box 3049 67653 Kaiserslautern e-mail: lefkidis(at)physik(dot)uni(dash)kl(dot)de Tel.: +49 631 205 3207 -------------------------------------------------------------------                     From owner-chemistry@ccl.net Tue May 20 11:15:00 2014 From: "Daniel Jana dfjana/./gmail.com" To: CCL Subject: CCL: increasing MAXIT in GAMESS Message-Id: <-50098-140520110627-2636-9v+5YtMolmYuGpjNeV044w:_:server.ccl.net> X-Original-From: Daniel Jana Content-Type: text/plain; charset=UTF-8 Date: Tue, 20 May 2014 17:06:21 +0200 MIME-Version: 1.0 Sent to CCL by: Daniel Jana [dfjana-*-gmail.com] Hello, The other suggestions seem to me the best way to proceed, using the VEC from the previous unconverged calculation. However, if you indeed need to change the source, what you are looking for should be in: source/inputa.src (the path is relative to the root of Gamess-US). For the version I have here (2013-R1) it's on line 3863: IF(MAXIT.LE.0 .OR. MAXIT.GT.200) THEN Although you may want to run into other problems, if you are already facing SCF convergence problems. Best, Daniel Jana On 20 May 2014 10:59, Georg Lefkidis lefkidis:-:physik.uni-kl.de wrote: > > Sent to CCL by: "Georg Lefkidis" [lefkidis,+,physik.uni-kl.de] > Dear all, > > I am trying to run a calculation on a heavily correlated cluster, which, > however, already fails at the SCF level. After playing along with damping > and level shifting, I believe that it now is converging (the energy > decreases smoothly). However the maximal value MAXIT=200 is probably not > enough since it does not actually reach convergence. I believe that further > iterations might be necessary. Is there a way to increase this? I remember > once reading that GAMESS must be recompiled with some value changed, but I > do not know anymore..... > > Any help would be heavily appreciated. > > Best regards > George Lefkidis > > > ------------------------------------------------------------------- > Dr. Georg Lefkidis > Dept. of Physics > University of Kaiserslautern > PO Box 3049 > 67653 Kaiserslautern > e-mail: lefkidis(at)physik(dot)uni(dash)kl(dot)de > Tel.: +49 631 205 3207 > -------------------------------------------------------------------> > From owner-chemistry@ccl.net Tue May 20 11:50:00 2014 From: "bonoit bonoit ablux13() gmail.com" To: CCL Subject: CCL: Critical energy Message-Id: <-50099-140520112749-10534-6bMS+wX9iVwceDkLuyeMvw:_:server.ccl.net> X-Original-From: "bonoit bonoit" Date: Tue, 20 May 2014 11:27:44 -0400 Sent to CCL by: "bonoit bonoit" [ablux13*gmail.com] Dear CCLers, I'm using on RRKM theory to calculate the critical energy (E0). In the given expression for such calculation we have Ecl (E0=Ecl+sum...). My question is: Is this Ecl just Ea (activation energy)? or is it calculated diffrently? Thank you in advance Any help is well welcomed Sincerely, Bonoit From owner-chemistry@ccl.net Tue May 20 17:36:01 2014 From: "Robert Molt r.molt.chemical.physics ~~ gmail.com" To: CCL Subject: CCL: increasing MAXIT in GAMESS Message-Id: <-50100-140520123705-26574-OIx7Prv3tRih/ECs50966w]![server.ccl.net> X-Original-From: Robert Molt Content-Type: multipart/alternative; boundary="------------040906030605030309060108" Date: Tue, 20 May 2014 12:36:57 -0400 MIME-Version: 1.0 Sent to CCL by: Robert Molt [r.molt.chemical.physics~~gmail.com] This is a multi-part message in MIME format. --------------040906030605030309060108 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Everything that has been said has been true about restarting from a new initial guess. However, be careful that more iterations is the answer. Is there real progression between iterations? Is it truly moving downward in energy? In my experience, more iterations than 200 is almost never the answer (you have a bigger problem, requiring a different initial density guess, switching SCF type, turn off dampening, etc.). Dr. Robert Molt Jr., Ph.D. r.molt.chemical.physics##gmail.com Nigel Richards Research Group Department of Chemistry & Chemical Biology Indiana University-Purdue University Indianapolis LD 326 402 N. Blackford St. Indianapolis, IN 46202 On 5/20/14 7:39 AM, Yang Guo guoyang0123{=}gmail.com wrote: > From .dat file, you can find the MOs in $VEC section. Copy them to > the input file, and add the keyword: MOREAD (details can be found in > manual). You can employ the failed SCF MOs as the initial guess of a > new calculation. > > > 2014-05-20 16:59 GMT+08:00 Georg Lefkidis lefkidis:-:physik.uni-kl.de > >: > > > Sent to CCL by: "Georg Lefkidis" [lefkidis,+,physik.uni-kl.de > ] > Dear all, > > I am trying to run a calculation on a heavily correlated cluster, > which, > however, already fails at the SCF level. After playing along with > damping > and level shifting, I believe that it now is converging (the energy > decreases smoothly). However the maximal value MAXIT=200 is > probably not > enough since it does not actually reach convergence. I believe > that further > iterations might be necessary. Is there a way to increase this? I > remember > once reading that GAMESS must be recompiled with some value > changed, but I > do not know anymore..... > > Any help would be heavily appreciated. > > Best regards > George Lefkidis > > > ------------------------------------------------------------------- > Dr. Georg Lefkidis > Dept. of Physics > University of Kaiserslautern > PO Box 3049 > 67653 Kaiserslautern > e-mail: lefkidis(at)physik(dot)uni(dash)kl(dot)de > Tel.: +49 631 205 3207 > ------------------------------------------------------------------- > > > > -= This is automatically added to each message by the mailing > script =- > E-mail to subscribers: CHEMISTRY(a)ccl.net > or use:> > E-mail to administrators: CHEMISTRY-REQUEST(a)ccl.net > or use> Conferences: > http://server.ccl.net/chemistry/announcements/conferences/> > > --------------040906030605030309060108 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit
Everything that has been said has been true about restarting from a new initial guess.  However, be careful that more iterations is the answer.  Is there real progression between iterations?  Is it truly moving downward in energy?  In my experience, more iterations than 200 is almost never the answer (you have a bigger problem, requiring a different initial density guess, switching SCF type, turn off dampening, etc.).
Dr. Robert Molt Jr., Ph.D.
r.molt.chemical.physics##gmail.com
Nigel Richards Research Group
Department of Chemistry & Chemical Biology
Indiana University-Purdue University Indianapolis
LD 326
402 N. Blackford St.
Indianapolis, IN 46202
On 5/20/14 7:39 AM, Yang Guo guoyang0123{=}gmail.com wrote:
From .dat  file, you can find the MOs in $VEC section. Copy them to the input file, and add the keyword: MOREAD (details can be found in manual). You can employ the failed SCF MOs as the initial guess of a new calculation. 


2014-05-20 16:59 GMT+08:00 Georg Lefkidis lefkidis:-:physik.uni-kl.de <owner-chemistry(a)ccl.net>:

Sent to CCL by: "Georg Lefkidis" [lefkidis,+,physik.uni-kl.de]
Dear all,

I am trying to run a calculation on a heavily correlated cluster, which,
however, already fails at the SCF level. After playing along with damping
and level shifting, I believe that it now is converging (the energy
decreases smoothly). However the maximal value MAXIT=200 is probably not
enough since it does not actually reach convergence. I believe that further
iterations might be necessary. Is there a way to increase this? I remember
once reading that GAMESS must be recompiled with some value changed, but I
do not know anymore.....

Any help would be heavily appreciated.

Best regards
George Lefkidis


-------------------------------------------------------------------
Dr. Georg Lefkidis
Dept. of Physics
University of Kaiserslautern
PO Box 3049
67653 Kaiserslautern
e-mail: lefkidis(at)physik(dot)uni(dash)kl(dot)de
Tel.: +49 631 205 3207
-------------------------------------------------------------------



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--------------040906030605030309060108-- From owner-chemistry@ccl.net Tue May 20 20:37:00 2014 From: "D. Boyd dboyd*o*iupui.edu" To: CCL Subject: CCL: Gordon Research Conference on Computational Chemistry Message-Id: <-50101-140520203621-26736-o/3LJNpzR+8/BpbyMYDK7A%%server.ccl.net> X-Original-From: "D. Boyd" Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=us-ascii Date: Tue, 20 May 2014 20:36:14 -0400 Mime-Version: 1.0 (Mac OS X Mail 7.2 \(1874\)) Sent to CCL by: "D. Boyd" [dboyd#%#iupui.edu] The 15th biennial Gordon Research Conference on Computational Chemistry is being held this summer, July 20-25, 2014 at Mount Snow Resort in West Dover, Vermont, USA. The chairman of the conference is Professor Jay W. Ponder (Washington University in St. Louis, USA). The vice chair is Professor Adrian J. Mulholland (University of Bristol, UK). The theme of the conference is Accuracy and Sampling Across Quantum Chemistry and Molecular Modeling. Sessions will be held on: The Future of Molecular Simulation and Quantum Chemistry Accurate Free Energy Calculations NMR-Related Calculations Status of DFT and Other Low-Cost Wavefunction Methods Modeling of Protein pKa Values Modeling Biomolecule-Membrane Interactions Methods for Treatment of Transition Metals Coarse Grained and Multi-Scale Modeling For more information, go to http://www.grc.org/programs.aspx?year=2014&program=compchem To apply to participate, go to http://www.grc.org/application.aspx?id=11140 The conference is filling fast. Donald B. Boyd, Ph.D. Research Professor of Chemistry Department of Chemistry and Chemical Biology Indiana University-Purdue University Indianapolis Indianapolis, Indiana 46202-3274, U.S.A. Cofounder, Gordon Research Conference on Computational Chemistry, http://chem.iupui.edu/rcc/grccc.html Founder, American Chemical Society's annual symposia on Emerging Technologies in Computational Chemistry Cofounder, Reviews in Computational Chemistry, http://chem.iupui.edu/rcc/rcc.html From owner-chemistry@ccl.net Tue May 20 22:39:01 2014 From: "wai-to chan wai-to.chan*|*alumni.uoguelph.ca" To: CCL Subject: CCL: increasing MAXIT in GAMESS Message-Id: <-50102-140520183710-2784-ACTEdPKIE+sjYWLuH8VZ6A]~[server.ccl.net> X-Original-From: wai-to chan Content-Type: multipart/alternative; boundary=089e0112d166de94d904f9dc84c9 Date: Tue, 20 May 2014 18:37:04 -0400 MIME-Version: 1.0 Sent to CCL by: wai-to chan [wai-to.chan++alumni.uoguelph.ca] --089e0112d166de94d904f9dc84c9 Content-Type: text/plain; charset=UTF-8 You may have to change this line from comp.src (line 1578 2013 version) MAXIT = 200 to the umber of iteration you want as well as the line from inputa.src as suggested by the other poster. Wai-To Chan --089e0112d166de94d904f9dc84c9 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
=C2=A0You may have to change this line from= comp.src (line 1578 2013 version)


=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 MAXIT=C2=A0=C2=A0 =3D 200=C2=A0


to the umber of itera= tion you want as well as the line from inputa.src
as suggested by the other poster.

Wai-To Chan
--089e0112d166de94d904f9dc84c9--