Failed to create virtual environment when using --relocatable option, what's wrong?

[smith jack]

all things works well without --relocatable option, the error info
when using --relocatable option is as follows :

F:\PythonEnv\djangoEnv>virtualenv f:\PythonEnv\djangoEnv2 --relocatable
PYTHONHOME is set.  You *must* activate the virtualenv before using it
The environment doesn't have a file f:\PythonEnv\djangoEnv2\Scripts\activate_thi
s.py -- please re-run virtualenv on this environment to update it
Traceback (most recent call last):
  File "E:\Tools\gov\tools\chrome_python\Scripts\virtualenv-script.py", line 7,
in ?
    sys.exit(
  File "e:\tools\gov\tools\chrome_python\lib\site-packages\virtualenv-1.6.4-py2.
4.egg\virtualenv.py", line 802, in main
    make_environment_relocatable(home_dir)
  File "e:\tools\gov\tools\chrome_python\lib\site-packages\virtualenv-1.6.4-py2.
4.egg\virtualenv.py", line 1338, in make_environment_relocatable
    fixup_scripts(home_dir)
  File "e:\tools\gov\tools\chrome_python\lib\site-packages\virtualenv-1.6.4-py2.
4.egg\virtualenv.py", line 1357, in fixup_scripts
    for filename in os.listdir(bin_dir):
WindowsError: [Errno 3] : 'f:\\PythonEnv\\djangoEnv2\\Scripts/*.*'