Unhandled exception (#a6ef4242) #2684

sqlmap version: 1.1.9.4#dev
Python version: 2.7.10
Operating system: posix
Command line: sqlmap.py -u ******************************************** --os-shell -v 1
Technique: UNION
Back-end DBMS: MySQL (fingerprinted)

Traceback (most recent call last):
  File "sqlmap.py", line 155, in main
    start()
  File "lib/controller/controller.py", line 653, in start
    action()
  File "lib/controller/action.py", line 154, in action
    conf.dbmsHandler.osShell()
  File "plugins/generic/takeover.py", line 80, in osShell
    self.initEnv(web=web)
  File "lib/takeover/abstraction.py", line 186, in initEnv
    self.webInit()
  File "lib/takeover/web.py", line 293, in webInit
    self._webFileInject(stagerContent, stagerName, directory)
  File "lib/takeover/web.py", line 147, in _webFileInject
    query += getSQLSnippet(DBMS.MYSQL, "write_file_limit", OUTFILE=outFile, HEXSTRING=hexencode(uplQuery))
  File "lib/core/convert.py", line 121, in hexencode
    return unicodeencode(value, conf.charset or UNICODE_ENCODING).encode("hex")
NameError: global name 'conf' is not defined