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struct s_v
  {
   int a, b, c, d, e, f, g, h, i, j;
  };

struct s_e
  {
   int z, y, x, w, v, u;
  };

  std::vector<s_v>* p_v = (std::vector<s_v>*)sc.GetPersistentPointer(1);
  std::vector<s_e>* p_e = (std::vector<s_e>*)sc.GetPersistentPointer(2);

  //Allocate dynamic memory
  if (sc.LastCallToFunction)
  {
    if (p_v != NULL)
    {
      delete p_v;
      sc.SetPersistentPointer(1, NULL);
    }
    if (p_e != NULL)
    {
      delete p_e;
      sc.SetPersistentPointer(2, NULL);
    }
    return;
//after closing the simple chartbook, this is when a hang occurs
  }

  if (p_v == NULL)
  {
    p_v = new std::vector<s_v>;

    if (p_v != NULL)
      sc.SetPersistentPointer(1, p_v);
    else
    {
      sc.AddMessageToLog("Memory allocation error 1", 1);
      return;
    }
  }

  if (p_e == NULL)
  {
    p_e = new std::vector<s_e>;

    if (p_e != NULL)
      sc.SetPersistentPointer(2, p_e);
    else
    {
      sc.AddMessageToLog("Memory allocation error 2", 1);
      return;
    }
  }