cbepctl.exe: global name 'sys' is not defined when bucket is not presented ( windows)

windows 2.0.2-769:

c:\Program Files\Couchbase\Server\bin>cbepctl.exe kiwi-r121:11210 -b standard_bu
cket0 -p "" set flush_param exp_pager_stime 5
Authentication error for standard_bucket0
Traceback (most recent call last):
File "cbepctl", line 176, in <module>
c.execute()
File "clitool.pyc", line 58, in execute
File "cbepctl", line 24, in g
sys.exit(1)
NameError: global name 'sys' is not defined