[Ipopt] Ipopt Digest, Vol 38, Issue 6
ZhangWeizhong
greatzwz at hotmail.com
Wed Feb 20 10:17:27 EST 2008
Hi, all:
I have figured it out for the initialization problem.
But now the error is
"
Invalid read of size 8
at 0x45d6ef0: DMOC_NLP::get_bounds_info(int, double*, double*, int, double*, int, doouble*, double*)
Address ox45d6fe4 is 4 bytes before a block of size 0 alloc'd
at 0x4022F14: operator new[](unsigned) (vg_replace_malloc.c:268)"e
I do not know why?
Because I have use Initialize() to allocate the memory to the variables in get_bounds_info()
The assignment is like the following
x_l=(double*)calloc(dim,sizeof(double).....
Anyone can help this?
Thank you.
Weizhong Zhang
----------------------------------------
> From: greatzwz at hotmail.com
> To: ipopt at list.coin-or.org
> Subject: RE: Ipopt Digest, Vol 38, Issue 6
> Date: Tue, 12 Feb 2008 17:25:35 -0500
>
>
> Hi, all
> Thank Dr Andreas for making it clear about "Hessian approximation".
> And I have used valgrind to test my program.
>
> The errors are
> "Conditional jump or move depends on uninitialised value(s)"
> "Use of uninitialised value of size 4".
> "Too few degrees of freedom (n_x = 0, n_c = 104). Trying fixed_variable_treatment = RELAX_BOUNDS"
>
> My program is modified from "MyExample" from IPOPT package
> The main program is "dmocexample.cpp", in which it call mynlp(mynlp= new DMOC_NLP();)
>
> The program which defines the methods such as get_nlp_info() is called dmoc_nlp.cpp
>
> My question is
> " Can I initialize the variables before "constructor" , "destructtor" and the methods in dmoc_nlp.cpp?"
> Or I have to initialize the variables in different functions like "get_nlp_info()" and so on?
>
> It seems that I can not define the global variables in the main program"dmocexample.cpp" so that I do not have to define them in the "dmoc_nlp.cpp". And even I initialized variables in "dmoc_nlp.cpp" outsides of the functions, it seems it is not successfully initialized.
>
> Anyone can give some suggestions? Thank you so much.
> Weizhong Zhang
> Electrical and Computer Engieering Dept
> University of Louisville
>
>
>
>
>
>
>
> ----------------------------------------
>> From: ipopt-request at list.coin-or.org
>> Subject: Ipopt Digest, Vol 38, Issue 6
>> To: ipopt at list.coin-or.org
>> Date: Mon, 11 Feb 2008 12:00:02 -0500
>>
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>> Today's Topics:
>>
>> 1. Re: [Coin-ipopt] FW: Help on "Hessian Approximation" of my
>> optimization problem (Andreas Waechter)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Mon, 11 Feb 2008 11:01:45 -0500 (EST)
>> From: Andreas Waechter
>> Subject: Re: [Ipopt] [Coin-ipopt] FW: Help on "Hessian Approximation"
>> of my optimization problem
>> To: ZhangWeizhong
>> Cc: coin-ipopt at list.coin-or.org
>> Message-ID:
>> Content-Type: text/plain; charset="x-unknown"
>>
>> Hi,
>>
>> It is correct that you don't need to overload the bool eval_h function if
>> you want to use the quasi-Newton option of Ipopt.
>>
>> But you should not change the argument list for the get_nlp_info function
>> - if you do that, the Ipopt code will still try to call the original
>> function, and as you saw, this doesn't work since this is then a pure
>> virtual function, and you can't run the program. Just set nnz_h_lag to
>> zero in your implementation of the original method of TNLP.
>>
>> As for the segmentation fault, it probably means that there is something
>> wrong in the way you call Ipopt. The easiest way to debug such memory
>> problems is to use a memory checker, such as the free valgrind program for
>> Linux.
>>
>> Regards,
>>
>> Andreas
>>
>>
>> On Thu, 7 Feb 2008, ZhangWeizhong wrote:
>>
>>>
>>> Sorry, I forgot the detailed information
>>> IPOPT version: 3.3.3
>>> My computer is i686 2.6.20-16-generic, ubuntu 7.10
>>>
>>>
>>> From: greatzwz at hotmail.comTo: greatzwz at hotmail.comSubject: Help on
>>> "Hessian Approximation" of my optimization problemDate: Wed, 6 Feb 2008
>>> 16:29:04 -0500
>>>
>>>
>>> Hi, friends: Sorry to bother you. I have one problem regarding
>>> "Hessian Approximation" in IPOPT application. In the main program, the
>>> option is configured as "app->Options()-
>>> SetStringValue("hessian_approximation","limited-memory")". It is
>>> indicated in the menu, I do not have to implement "bool eval_h()", so I
>>> commented it out in my_program.cpp and my_program.hpp. Then my program
>>> can be compiled successfully, however the resulted executable program is
>>> not working, the error message is "Segmentation fault(core dumped)". I
>>> thought maybe that I did not provide the hessian informationin the
>>> method "get_nlp_info(.... Index&nnz_h_lag...)". Thus I commented this
>>> parameter out in my_program.cpp and my_program.hpp correspondingly.
>>> Afterwards, I compiled the program. It still is successfully compiled.
>>> Now when I execute it, the error message is "pure virtual method called
>>> terminate called without an active exception" I have searched the
>>> websit! e, it seems all the methods I used did not include itself or
>>> other methods which are not defined previously.Thus I do not know why
>>> the error indicates "pure virtual method called". If anybody can help,
>>> I would appreciate that. Thank you so much. Weizhong Zhang> Subject:
>>> Welcome to the "Coin-ipopt" mailing list (Digest mode)> From:
>>> coin-ipopt-request at list.coin-or.org> To: greatzwz at hotmail.com> Date:
>>> Wed, 6 Feb 2008 16:09:16 -0500>> Welcome to the
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>> End of Ipopt Digest, Vol 38, Issue 6
>> ************************************
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