[Ipopt] MPI error using Ipopt

[Seth Watts]

I had the same problem, and replacing Mumps as the solver was the
work-around I used. It works well. Trying to delete the dummy mpi.h file
would be an easier fix if it works - I'd try that first, but be ready to
replace Mumps in the event removing the dummy header breaks it.

- Seth

On Tuesday, October 20, 2015, Gabriel Hackebeil <gabe.hackebeil at gmail.com>
wrote:

> The first thing I would try is rebuilding Ipopt without the
> ThirdParty/Mumps package. From what I recall, it includes a dummy “mpi.h”
> file to effectively serialize its own code. It’s very possible that your
> application is seeing that mpi.h file before the real one.
>
> Actually, you might first just try deleting the dummy mpi.h file from the
> Ipopt include/coin/ThirdParty installation directory, but that may or may
> not cause a different set of issues.
>
> Gabe
>
> On Oct 20, 2015, at 2:15 AM, max leo correa cordova <
> max-leo-19 at hotmail.com
> <javascript:_e(%7B%7D,'cvml','max-leo-19 at hotmail.com');>> wrote:
>
> Hello! I am new using Ipopt and have tested some example problems with c++
> interface. I want to use MPI for solving in parallel multiple NLP, but when
> runnning with MPI I get an error message. My cpp main file is:
>
> #include "IpIpoptApplication.hpp"
> #include "IpSolveStatistics.hpp"
> #include "MyNLP.hpp"
> #include "mpi.h"
> #include <iostream>
>
> using namespace Ipopt;
> using namespace std;
>
> int main(int argc, char** argv)
> {
>     int size, rank;
>     int i; double begin, end;
>     ApplicationReturnStatus status;
>     MPI_Init(&argc, &argv);
>      MPI_Comm_size(MPI_COMM_WORLD, &size);
>     MPI_Comm_rank(MPI_COMM_WORLD, &rank);
>     begin = MPI_Wtime();
>     if(rank == 0){
>         SmartPtr<IpoptApplication> app = IpoptApplicationFactory();
>         status = app->Initialize();
>         SmartPtr<TNLP> mynlp = new MyNLP();
>         status = app->OptimizeTNLP(mynlp);
>     }
> else{
>
>      }
>     end = MPI_Wtime();
>     MPI_Finalize();
>     cout<< end-begin<<endl;
>     return (int) status;
> }
>
> I compiles fine with:
> mpic++ -O3 -o example example.cpp -I/home/max/CoinIpopt/build/include/coin
> -L/home/max/CoinIpopt/build/lib -lipopt -llapack -ldl -lcoinmumps -lblas
> -lgfortran -lm -lquadmath -lcoinhsl -lcoinmetis
>
> and run with:
> mpirun -np 3 ./example
>
> but i get this message error
> *** The MPI_comm_size() function was called before MPI_INIT was invoked.
> *** This is disallowed by the MPI standard.
> *** Your MPI job will now abort.
> [master:4655] Local abort before MPI_INIT completed successfully; not able
> to aggregate error messages, and not able to guarantee that all other
> processes were killed!
>
> I am not sure why this error exists. It seems that using the ipopt linkers
> produce this error. Could you help me please?? Is there something wrong in
> the compilation step or how can I make ipopt run using MPI? I'll be grateful
> for your help.
> Thanks in advance
> max
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