Originally posted by: stephK

Hi,

Purify gives an  " Access violation reading location 0xfffffffffff" at line 6 . I don't know why.

Any Suggestions ?

Thanks a lot.

       vector<IloModel> model_Bellman_multiple[52];

      vector<IloCplex> cplex_B_multiple[52];

  1    for(int t=0;t<=51;t++)
  2              for(int i=0;i<n;i++)
  3          {
  4             IloModel model(env);
  5            model_Bellman_multiple[t].push_back(model);
  6              cplex_B_multiple[t].push_back(IloCplex(model_Bellman_multiple[t].back()));

              ......

}

Originally posted by: Laci Ladanyi

errr... what is the for loop on line 2, and what is the value of n?

Originally posted by: stephK

n is equal to 5

Unless you modify 't' in the code you left out this looks correct at first glance. Can you try to split line 6 into multiple statements:

IloModel m = model_Bellman_multiple[t].back();
IloCplex cplex(m);
cplex_B_multiple[t].push_back(cplex);

And then check what exactly is the statement purify complains about?

Originally posted by: stephK

 t is unmodified in the loop with n.  Access violation occurs when t=0 and i=0.

In attached file the purify output.

Originally posted by: Laci Ladanyi

Your image shows that you try to push an IloModel onto cplex_B_multiple[t]. You need to push an IloCplex object to the end of that vector.

Originally posted by: Laci Ladanyi

Never mind... I have missed that there is automatic constructor for IloCplex from IloModel... :-(

The only suspicious thing in your code I can see is this line:

objectif_inf_multiple[t].push_back(IloObjective())

(there is a missing env argument to the IloObjective constructor) but it looks like you never even get there. Could you provide a minimal example how to reproduce this and post the code here?

I also wonder why the exception address listed is CpxGoalNCallbackI::main(). Is your code in a callback or in a goal?

Originally posted by: stephK

Thank you very much  for your collaboration. To find better where the problem is, I writed this simple code:

int main(int argc, char *argv[])
{
    IloEnv env1;
    IloModel m(env1);
    IloCplex cplex(m);

In attached file the purify report I obtain.

ps: code compile et run well without purify.

I stared hard at your code but could not spot any problem. What I find suspicious is that the error report contains a reference to function CpxGoalNCallbackI::main() which is definitely not invoked in that place.

Could this be a problem with purify itself?