[Coin-lpsolver] Re: [Coin-bcpdiscuss] BAP question

[Matthew Galati]

That seems to have fixed it for me - at least for instance = 
small/6.1.aap. Thanks, John.

Peter, let us know if this cleared it up for you - or if you still have 
trouble.

Matt


>
> Hopefully fixed problem (and fixed unitTest)
>
> John Forrest
>
>
> Matthew Galati <magh at lehigh.edu>
> Sent by: coin-lpsolver-bounces at list.coin-or.org
>
> 04/18/2005 11:47 PM
>
> 	
> To
> 	coin-bcpdiscuss at list.coin-or.org, coin-lpsolver at list.coin-or.org
> cc
> 	
> Subject
> 	[Coin-lpsolver] Re: [Coin-bcpdiscuss] BAP question
>
>
>
> 	
>
>
>
>
>
> Peter,
>
> It seems to be crashing because, after finding an LP to be infeasible 
> (in BCP_lp_fathom), it is asking CLP for a dual ray and sending this 
> to BCP_restore_feasibility - but CLP returns NULL for the dual ray.
>
> Is anyone using BCP plus a recent version of CLP to do pricing?
>
> Matt
>
>
>
> Hi Peter,
>
> I am sorry that the discussion list is not as active as you might 
> hope. In the future, if your question is not answered by bcpdiscuss, 
> you should try the general coin discussion list. There are only a few 
> people on this list, but many on coin-discuss.
>
> I was able to repeat the error. It looks like the dual vector (pi) is 
> NULL at the point where it crashes. Last time I tried this (over one 
> year ago), it was working fine. So, something must have changed in BCP 
> or CLP. When I have some time, I will debug it and get back to you.
>
> Thanks,
> Matt
>
>
>
> ------------------------------
> ------------------------------
>
> Yes the example is right one from the link. And I am using Linux,
> By looking at the par.par file, it is using AAP_datafile 
>  ../Data/small/6.1.aap.
> The reason I didn't put the question to the discussion list, no one 
> answers my previous questions.
>  
> Thanks,
>  
> Peter.
>
> Sending this again.... this time I removed the long LOG file.
>
> Matt
>
> Hi Heesu,
>
> I am forwarding your question to COIN's BCP discussion list. I have 
> not used BCP in a long time - and some things may have changed.
>
> Can you tell us more about what type of environment you are running in 
> (Linux? Unix?), etc. Also, which example instance did you try?  Is 
> this the AAP_BP example from 
> http://sagan.ie.lehigh.edu/coin/COIN_EXAMPLES/AAP_BP/Doc/aap/index.html ?
>
> I will try to repeat it when I have some free time. Has anyone else 
> used AAP_BP? Had any trouble?
>
> Matt
>
> -- 
> Matthew Galati - Optimization Developer
> SAS Institute - Analytical Solutions
> Phone 919-531-0332, R5327
> Fax   919-677-4444
> http://coral.ie.lehigh.edu/~magh <http://coral.ie.lehigh.edu/%7Emagh>
> http://ordlnx2.na.sas.com/projects/OptWiki
> http://www.sas.com/technologies/analytics/optimization/
>
>
> -------- Original Message --------
> Subject:
> 	BAP question
> Date:
> 	Fri, 15 Apr 2005 15:38:39 -0500
> From:
> 	Heesu Hwang <hxh9528 at exchange.uta.edu> <mailto:hxh9528 at exchange.uta.edu>
> To:
> 	<magh at lehigh.edu> <mailto:magh at lehigh.edu>
>
>
>
>
> Dear, M.V. Galati.
>
> My name is Heesu Hwang, and I am a Ph.D student in IMSE of University of
> Texas at Arlington, Texas, USA.
> My current research is about generating columns using COIN/BCP.
> I came across your example and have tried to run it after compilation.
> It has given some results, however didn't show them all, terminating with
>
> "Segmentation fault" message.
>
> I am not good a Unix, but usually I've got that kind of messages when I
> used pointers improperly or too much memory spaces.
>
> Attached is the result.
> Could you give me some comments on it?
>
> Sincerely,
>
> Heesu Hwang.
>  
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