[Mailman-Users] an error

[Andrea]

hi,
i installed mailman on a webmail of my job
and then of create the list mailman, appear the next error
Traceback (most recent call last):
  File "/usr/sbin/newlist", line 226, in ?
    main()
  File "/usr/sbin/newlist", line 208, in main
    }, mlist=mlist)
  File "/usr/lib/mailman/Mailman/Utils.py", line 557, in maketext
    return findtext(templatefile, dict, raw, lang, mlist)[0]
  File "/usr/lib/mailman/Mailman/Utils.py", line 534, in findtext
    raise IOError(errno.ENOENT, 'No template file found', templatefile)
IOError: [Errno 2] No template file found: 'newlist.txt'

I have no idea what could be.
then i run the mailman and seems to be all normal
anybody knows why is that error?

Thanks

           Andrea