失败后使用appcfg的GAE错误

D:\kubox\python\GAE>appcfg.py rollback D:\kubox\python\GAE\myapp1
Traceback (most recent call last):
  File "D:\kubox\python\GAE\appcfg.py", line 77, in <module>
    DIR_PATH = get_dir_path(os.path.join('lib', 'ipaddr'))
  File "D:\kubox\python\GAE\appcfg.py", line 67, in get_dir_path
    'file and %s.' % sibling)
ValueError: Could not determine directory that contains both, this file and lib\
ipaddr.
D:\kubox\python\GAE>appcfg.py rollback D:\kubox