Crash on MagickWriteImageFile (on Windows)

Dear all,

  I wonder how to use MagickWriteImageFile (on Windows 7, 64 bits). Is there any 
example? I would think I am doing things right but I get a crash when calling 
the above mentioned function. The following is my main.cpp:

#include <iostream>
#include <wand/MagickWand.h>

using namespace std;

int main() {
     const int x_size=2560, y_size=2160, img_size=x_size*y_size;
     MagickBooleanType status;
     MagickWand *wand = NULL;

     MagickWandGenesis();
     wand = NewMagickWand();

     unsigned short *pixels;
     pixels = new unsigned short[img_size];

     for (int j=0; j<img_size; ++j) {
         pixels[j] = unsigned short(j*65535./img_size);
     }

     if (MagickConstituteImage(wand, x_size, y_size, "I", ShortPixel, pixels) == 
MagickFalse)
         cout << "Cannot constitute image" << endl;
     if (MagickSetImageFormat(wand, "TIFF") == MagickFalse)
         cout << "Cannot set format" << endl;

// This works fine
     if (MagickWriteImages(wand, "test.tif", MagickTrue) == MagickFalse)
         cout << "Cannot write test.tif" << endl;

// This does not work! Crash on MagickWriteImageFile
     FILE *file;
     file = fopen("test2.tif", "wb");
     if (MagickWriteImageFile(wand, file) == MagickFalse) // CRASH here!
         cout << "Cannnot write test2.tif" << endl;
     fclose(file);

     wand = DestroyMagickWand(wand);
     MagickWandTerminus();
     delete pixels;

     return 0;
}


Some more info: I have installed the ImageMagick library using 
ImageMagick-6.7.3-3-Q16-windows-x64-dll.exe, and I compile the main.cpp with 
nmake (from VC) and the following Makefile:

all: main

clean:
     del *.exe *.obj

main: main.obj
     link /OUT:"main.exe" /LIBPATH:"C:\Program Files\ImageMagick-6.7.3-Q16\lib" 
CORE_RL_wand_.lib main.obj

main.obj: main.cpp
     cl /I "C:\Program Files\ImageMagick-6.7.3-Q16\include" /EHsc /c main.cpp /D 
WINDOWSXX


Thank you very much!

 	Andrea Parenti