Why Stack Overflow???Help!!!!!!!!!!

Hi, there,

I generated a .dll library using managed C++ within .NET framework.

A C# console application was used to test functions in .dll (generated by managed C++).
There is a function "func001" in .dll allocates unmanaged array: double *aa= new double[size];
It always gives me a crash "Fatal Stack Overflow Error", even if size==3.

The problem seems have no trouble to allocate managed arrays. I really do not know why. Please kindly help.

In C#:

Code:

---

...
 NS01.Cls01  mycls = new NS01.Cls01();
 mycls.Func001(...);
 ...

---

The .dll library in managed c++ is like:

Code:

---

namespace NS01
  {
      void Cls01::Func001(...)
      {
            ...
            size = (int)(30.3/1.34);
            double *tt = new double[size];  // it would not execute this one
            ...
      }
  }

---

Why could "Fatal Stack Overflow Error" happen? There is much memory needed.
I really do not know why. Could anyone please help?
Thank you so much.