July 2009 - Neos-comments - mailman3.cels.anl.gov

[NEOS Support Req #235] Re: MINTO question
by Jeff Linderoth 31 Jul '09

31 Jul '09

Hi Chris, ceweld(a)wm.edu wrote: > I have used the NEOS Server for MINTO with AMPL model and data submission in the past without an issue, however, this week I have tried several times to submit a job unsuccessfully. The following message is given after trying to submit the job: > > "No stations available for solver milp:MINTO:AMPL. > Solver administrator has been notified." > > Can you provide any clarification if the MINTO Server is down, overcrowded, or another issue? Should I just continue trying daily? > > Thanks for your help. NEOS Server is a great tool. > > Chris Weld Sorry -- there was a power outage ay Lehigh (where the MINTO solver is housed), and the machines were just rebooted. I started up NEOS again, so MINTO should work for you now. Cheers, -Jeff Linderoth for the NEOS Team -- Jeff Linderoth, Associate Professor Dept. of Industrial and Systems Engineering University of Wisconsin-Madison O: 608-890-1931 http://www.engr.wisc.edu/ie/faculty/linderoth_jeffrey.html

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[NEOS Support Req #229] Question concerning GAMS/XPRESS MILP solver
by Dirk van den Hoogen 31 Jul '09

31 Jul '09

Dear Sir/Madam, I tried to run the GAM/XPRESS solver for several jobs (#1914073 or #1913790) but I don't get any results in my e-mail. I checked the job queue and all the jobs I send to the server are processed. I hope you can help. Thanks in advance for you answer. Dirk van den Hoogen

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[NEOS Support Req #234] Diet Problem Model Online
by Sampson, Julie 31 Jul '09

31 Jul '09

Hi I use this online model with Year 12 High School students studying Linear Modelling. I last used it in 2008. I have just returned to the site for a new class and the Solve button is not appearing at the bottom of the page. Students select their foods but we can't get a solution. Any suggestions? Appreciate your help. I'll be disappointed if this interactive resource is no longer working. Julie Julie Sampson Director of Curriculum Cornerstone College 68 Adelaide Road, (PO Box 820) MOUNT BARKER SA 5251 Australia Ph: 08 8398 2566 Fax: 08 8398 3391

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[NEOS Support Req #233] MINTO question
by ceweld＠wm.edu 30 Jul '09

30 Jul '09

I have used the NEOS Server for MINTO with AMPL model and data submission in the past without an issue, however, this week I have tried several times to submit a job unsuccessfully. The following message is given after trying to submit the job: "No stations available for solver milp:MINTO:AMPL. Solver administrator has been notified." Can you provide any clarification if the MINTO Server is down, overcrowded, or another issue? Should I just continue trying daily? Thanks for your help. NEOS Server is a great tool. Chris Weld

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[NEOS Support Req #232] using NEOS solvers for assigments in a course
by Pablo Rey 30 Jul '09

30 Jul '09

Dear colleagues, next term I will teach an undergraduate course on optimization at Universidad Diego Portales (Chile). I would like to suggest to the other lecturers that we could use NEOS server solvers for the computational assigments. I would like to know, if it is OK to use NEOS server to this course work. During Spring term (southern hemisphere...) we have (in all four sections) an enrollment of about 150 students. We plan to give 2 assigments to be solve by pairs of students. This amounts about 300 small LP or MIP instances. Thank you in advance, Pablo A. Rey Assistant Professor School of Industrial Engineering Universidad Diego Portales Santiago, Chile -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/

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[NEOS Support Req #231] porting simplex implementation from java to php
by Ruerd Heeg 30 Jul '09

30 Jul '09

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[NEOS Support Req #230] Problems with the Neos solver filter
by Sonja Veelken 27 Jul '09

27 Jul '09

Dear NEOS-Team, the last days I did a few tests running filter via the NEOS Server and I observed several times the following problem : ---------- Begin Solver Output ----------- Executing /home/neosotc/neos-5-solvers/filter-ampl/filter-driver.py File exists You are using the solver filter. Executing AMPL. processing data. processing commands. Error: /homes/leyffer/ampl/solvers.linux/minlp/filter: /homes/leyffer/ampl/solvers.linux/minlp/filter: cannot execute binary file Error: exit code 126 Presolve eliminates 3616 constraints and 3630 variables. Adjusted problem: 313 variables: 165 nonlinear variables 148 linear variables 213 constraints; 774 nonzeros 1 nonlinear constraint 212 linear constraints 1 nonlinear objective; 65 nonzeros. <BREAK> Best regards, Sonja Veelken ===================================== RWTH Aachen University Dr. Sonja Veelken Mathematik (Kontinuierliche Optimierung) Templergraben 55 D-52056 Aachen GERMANY. Tel.: ++49-241-80 90 652 Fax: ++49-241-80 92 390 E-Mail: veelken(a)mathc.rwth-aachen.de =====================================

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[NEOS Support Req #228] Re: Solver Errors
by Jeff Linderoth 22 Jul '09

22 Jul '09

Hello Lukas, luban(a)mail.uni-paderborn.de wrote: > Hello, > > I get always errors while using MINTO and Cbc Solver with AMPL > AMPL is operational again on the NEOS Lehigh computers. Cheers, -Jeff -- Jeff Linderoth, Associate Professor Dept. of Industrial and Systems Engineering University of Wisconsin-Madison O: 608-890-1931 http://www.engr.wisc.edu/ie/faculty/linderoth_jeffrey.html

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[NEOS Support Req #227] Re: license has expired
by Jeff Linderoth 22 Jul '09

22 Jul '09

Hello Jozsef, Ampl is operational again on the NEOS lehigh machines. Cheers, -Jeff Jeff Linderoth wrote: > Hi Jozsef, > > Bene Jďż˝zsef wrote: >> Dear Sir, Dear Madam, >> >> Today I tried to upload an optimization task to the solver cbc in >> format ampl, and I got the following output: >> >> Job 1908665 sent to hamms.ie.lehigh.edu >> password: jbqZNfaM >> ---------- Begin Solver Output ----------- >> Executing /home/neos/neos-solvers/cbc-ampl/cbc-ampl-driver.py >> Error: The license for this AMPL processor has expired. >> Load Avg: ( 0.0 , 0.0 , 0.0 ) >> File exists >> You are using the solver cbc-ampl. >> Executing AMPL. >> processing data. >> processing commands. >> Error (65280) in /home/neos/neos-bin/ampl -R amplin >> >> When can I use this solver again? >> > I apologize. I will try and get it up and running again today. > > Best regards, > -Jeff Linderoth for the NEOS Team > > -- Jeff Linderoth, Associate Professor Dept. of Industrial and Systems Engineering University of Wisconsin-Madison O: 608-890-1931 http://www.engr.wisc.edu/ie/faculty/linderoth_jeffrey.html

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[NEOS Support Req #226] Solver Errors
by luban＠mail.uni-paderborn.de 21 Jul '09

21 Jul '09

Hello, I get always errors while using MINTO and Cbc Solver with AMPL Best, Lukas Banach Job# : 1908880 Password : syeigbTq Solver : milp:Cbc:ampl Start : 2009-07-21 10:59:56 End : 2009-07-21 11:00:02 Host : point.ie.lehigh.edu Disclaimer: This information is provided without any express or implied warranty. In particular, there is no warranty of any kind concerning the fitness of this information for any particular purpose. ************************************************************* Job 1908880 sent to point.ie.lehigh.edu password: syeigbTq ---------- Begin Solver Output ----------- Executing /home/neos/neos-solvers/cbc-ampl/cbc-ampl-driver.py Error: The license for this AMPL processor has expired. Load Avg: ( 0.0 , 0.0 , 0.0 ) File exists You are using the solver cbc-ampl. Executing AMPL. processing data. processing commands. Error (65280) in /home/neos/neos-bin/ampl -R amplin ............................................................... NEOS Server Version 5.0 Job# : 1908878 Password : xhWEmrtc Solver : milp:MINTO:AMPL Start : 2009-07-21 10:59:18 End : 2009-07-21 10:59:22 Host : point.ie.lehigh.edu Disclaimer: This information is provided without any express or implied warranty. In particular, there is no warranty of any kind concerning the fitness of this information for any particular purpose. ************************************************************* Job 1908878 sent to point.ie.lehigh.edu password: xhWEmrtc ---------- Begin Solver Output ----------- Executing /home/neos/neos-solvers/minto-ampl/minto-ampl-driver.py Error: The license for this AMPL processor has expired. File exists You are using the solver mintoamp. Executing AMPL. processing data. processing commands. Error (65280) in /home/neos/neos-bin/ampl -R amplin

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