C++调用cplex，ERROR: the referenced IloExtractable has not been extracted

[qq_37254952]

我有一个关于C++调用cplex的问题想要请教。我所编写的程序运行后出现ERROR: the referenced IloExtractable has not been extracted，请问是什么原因呢？定义三维变量的内容为
#include <ilcplex/ilocplex.h>
#include <iostream>
using namespace std;
ILOSTLBEGIN
typedef IloArray<IloNumVarArray> NumVarMatrix;
typedef IloArray<NumVarMatrix> NumVar3Matrix;
int main(int argc, char** argv)
{
IloBool convex;
IloEnv env;
try {
IloModel model(env);

IloInt i,j,l,k;
IloInt N = 5;
IloInt K = 3;

NumVar3Matrix x(env,N*N*K);
for(i=0; i<=N; i++) {
x[i] = NumVarMatrix(env, N);
for(j=0; j<=N; j++) {
x[i][j] = IloNumVarArray(env,K);
for(k=1; k<=K; k++) {
x[i][j][k] = IloNumVar(env,0.0, 1.0, ILOBOOL);}
}}
麻烦看一下有问题吗？求赐教，非常感谢。

[shiter]

https://www.researchgate.net/topic/CPLEX