[FlopCpp] runtime error when defining constraints in separate methods

[Paul Huang]

Hello group.

I create a class, which maintains a MP_model as a member. In two separate
methods of this class, I define two constraints and add them to the
MP_model. At runtime, my program generates a runtime failure. Here is the
error message

"Run-Time Check Failure #0 - The value of ESP was not properly saved across
a function call. This is usually a result
of calling a function declared with one calling convention with a function
pointer declared with a different calling
convention."

I am using Visual C++ 2005 Express. The source codes are attached below. Can
someone please point out what the problem is and how to solve it?

An interesting observation is that if I comment out a MP_constraint
declaration is method f1(). The program will run without error even this
declaration seems to have nothing to do with another method f2(), which
declare another MP_constraint and maximize a simple objective.

Thanks,
Paul

------model.hpp----------------
#ifndef _model_hpp_
#define _model_hpp_

#include "flopc.hpp"
using namespace flopc;

    class model{
    public:

        MP_set S1, S2;
        MP_variable * Y;
        MP_model * mm;

        model(int numS1TimeRange,
              int numS2
             );

        ~model();

        void f1();
        void f2();
    };
#endif
----------------------------

-------model.cpp--------
#include "model.hpp"
#include <OsiCbcSolverInterface.hpp>


    model::model(int numS1,
        int numS2){
            S1= MP_set(numS1);
            S2 = MP_set(numS2);
            mm= new MP_model(new OsiCbcSolverInterface);
            Y=new MP_binary_variable(S1);

        };


    model::~model(){
            delete mm;
            delete Y;
        };


    void model::f1(){
        MP_constraint c2;   <===will run if this line is commented out.
    };


    void model::f2(){

        MP_constraint c1;
        c1=sum(S1, (*Y)(S1))<=2;
        (*mm).add(c1);

        (*mm).maximize(sum(S1, (*Y)(S1)));
        cout<<"Y size: "<<(*Y).size()<<endl;
        (*Y).display();

    }
--------------------------

-----main.cpp-------
#include "model.hpp"
#include <iostream>
using namespace std;
void main(){
    int numS1=5;
    int numS2=9;
    model m1(numS1, numS2);
    m1.f1();
    m1.f2();

}
----------------------------
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