Game Engine Runtime problem


I activated the Game Engine Runtime addon in Preferences.
It appears in file > export.

But it comes with the following error throwing at me:

Saving runtime to ‘F:\blender output\ est.exe’
Traceback (most recent call last):
File “F:\blender-2.69-windows32\2.69\scripts\addons\”, line 228, in execute,
File “F:\blender-2.69-windows32\2.69\scripts\addons\”, line 118, in WriteRuntime blend_file = open(blend_path, ‘rb’)
FileNotFoundError: [Errno 2] No such file or directory: ‘c:\users\frans\appdata\local\ emp\ mp5hoy9g\F__blender_output_test_exe.blend’

Please help me out here.