[Coin-ipopt] segmentation fault from IpoptSolve function

[Andreas Waechter]

Hi Tran,

I recommend to recompile your code with debug information (e.g., do a 
'make distclean', rerun configure and add the --enable-debug option, and 
then do a 'make install' again.).  Then you can run your own program that 
binds the Ipopt library through a debugger, or even better with the memory 
checker 'valgrind' (for Intel Linux).  The latter will tell you exactly 
where in the program the first failure in terms of memory access happens.

Of course, it is possible that there is a bug in the Ipopt code, but 
before you file a ticket at the Ipopt project page, you might want to make 
sure that the segmentation fault is not happening within your own 
call-back functions that you give to Ipopt.

If you still believe there is a bug in Ipopt, please open a ticket at the 
Ipopt project page and include exact instructions on how this error can be 
reproduced (including a sample C program).

I don't understand what you mean by "My runnable program (in C) is 
transported from Mac Intel to Linux Fedora" - if you mean by that that you 
compiled an executable on a Mac and then copied it to a Linux Fedore 
machine, this by itself might constitute a problem.  It is not clear to me 
if executables between those two operating systems are really binary 
compatible, and issues with inconsistent runtime libraries might be 
responsible for the problem you observe.  (On the other hand, since you 
already get some output from Ipopt I would suspect that this is not the 
case.)

Regards,

Andreas

On Mon, 29 Oct 2007, Tran Minh Tuan wrote:

> Hi all,
>
> My runnable program (in C) is transported from Mac Intel to Linux Fedora but 
> I saw this when trying to execute it:
>
> ******************************************************************************
> This program contains Ipopt, a library for large-scale nonlinear 
> optimization.
> Ipopt is released as open source code under the Common Public License (CPL).
>        For more information visit http://projects.coin-or.org/Ipopt
> ******************************************************************************
>
> NOTE: You are using Ipopt only with the MUMPS linear solver.
>     Other linear solvers might be more efficient (see Ipopt documentation).
>
> Segmentation fault
>
> I verified the parameters relative to memory and they are ok. So I don't know 
> which reason can cause this "segmentation fault" inside calling IpoptSolve.
>
> Thanks for your explanation,
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