Error in retrieval

Suddenly I am getting this expunge error and don't know why.
I need an extra set of eyes to point out what I'm doing wrong, since this is what I've used for a good long while.
Thanks!

btw- I use getmail for other addresses and all work fine.

 $ getmail -nlv --rcfile yahoo
getmail version 4.48.0
Copyright (C) 1998-2012 Charles Cazabon.  Licensed under the GNU GPL version 2.
SimpleIMAPSSLRetriever:[email protected]:993:
Traceback (most recent call last):
  File "/usr/bin/getmail", line 903, in <module>
    main()
  File "/usr/bin/getmail", line 867, in main
    success = go(configs, options.idle)
  File "/usr/bin/getmail", line 164, in go
    retriever.select_mailbox(mailbox)
  File "/usr/lib/python2.7/dist-packages/getmailcore/_retrieverbases.py", line 1400, in select_mailbox
    self.close_mailbox()
  File "/usr/lib/python2.7/dist-packages/getmailcore/_retrieverbases.py", line 1378, in close_mailbox
    self.conn.expunge()
  File "/usr/lib/python2.7/imaplib.py", line 441, in expunge
    typ, dat = self._simple_command(name)
  File "/usr/lib/python2.7/imaplib.py", line 1088, in _simple_command
    return self._command_complete(name, self._command(name, *args))
  File "/usr/lib/python2.7/imaplib.py", line 918, in _command_complete
    raise self.error('%s command error: %s %s' % (name, typ, data))
imaplib.error: EXPUNGE command error: BAD ['[CANNOT] EXPUNGE failed - Mailbox has read-only access']


 $ cat .getmail/yahoo 
[options]
message_log = ~/.getmail/log_yahoo

[retriever]
type = SimpleIMAPSSLRetriever
server =  imap.mail.yahoo.com
port = 993
username = xxxxxxxx 
password = xxxxxxxx
mailboxes = ("Inbox", "wnop")

[destination]
type = MDA_external
path = /usr/bin/procmail