[Coin-ipopt] Segmentation Fault (Quasi Newton option)

[Steven Dirkse]

Damien,

Have you tried running the problem that sometimes fails on Linux under 
valgrind?  I've been very impressed with valgrind - it finds all sorts 
of bugs and potential problems.  If you are accessing junk memory in 
this case, you'll get a report from valgrind about it and you won't have 
to do any guesswork.

www.valgrind.org I think or I can tell you more about it offline.

damien at khubla.com wrote:
> I've had this on Linux and on Windows.  The pointer is pointing to junked
> memory.  Can you repeat it consistently?  I can get it sometimes by
> returning false from one of the evaluation calls but it's not consistent
> enough for me to give instructions to duplicate it.
> 
> Damien
> 
> 
>>Hi,
>>
>>I am working with the 3.1.0 version of IPOpt and am using the Quasi
>>Newton option to approximate the Hessian.
>>After several (100) iterations IPOpt gives a segmentation fault. The
>>call stack is -
>>
>>=======================================================
>>Program received signal SIGSEGV, Segmentation fault.
>>0x0815df07 in Ipopt::SmartPtr<Ipopt::LowRankUpdateSymMatrixSpace
>>const>::operator-> ()
>>(gdb) where
>>#0  0x0815df07 in Ipopt::SmartPtr<Ipopt::LowRankUpdateSymMatrixSpace
>>const>::operator-> ()
>>#1  0x0815f72a in Ipopt::LowRankAugSystemSolver::Solve ()
>>#2  0x081064bf in Ipopt::AugRestoSystemSolver::Solve ()
>>#3  0x08152e40 in Ipopt::LeastSquareMultipliers::CalculateMultipliers ()
>>#4  0x081494d0 in Ipopt::IpoptAlgorithm::AcceptTrialPoint ()
>>#5  0x081455cb in Ipopt::IpoptAlgorithm::Optimize ()
>>#6  0x081a6964 in Ipopt::MinC_1NrmRestorationPhase::PerformRestoration ()
>>#7  0x0810f8a5 in Ipopt::BacktrackingLineSearch::FindAcceptableTrialPoint
>>()
>>#8  0x08147515 in Ipopt::IpoptAlgorithm::ComputeAcceptableTrialPoint ()
>>#9  0x08145533 in Ipopt::IpoptAlgorithm::Optimize ()
>>#10 0x080890bf in Ipopt::IpoptApplication::call_optimize ()
>>#11 0x08087d84 in Ipopt::IpoptApplication::OptimizeNLP ()
>>#12 0x08087434 in Ipopt::IpoptApplication::OptimizeTNLP ()
>>=========================================================
>>
>>Someone else faced the same problem about a month back. Was wondering
>>if someone knows the reason or has a solution for this problem.
>>
>>Thanks,
>>~ Sonia
>>
>>_______________________________________________
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>>Coin-ipopt at list.coin-or.org
>>http://list.coin-or.org/mailman/listinfo/coin-ipopt
>>
> 
> 
> 
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-- 
Steven Dirkse, Ph.D.    GAMS Development Corporation
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