Memory Error

[Raffi Khatchadourian <khatchad@xxxxxxxxxxxxxxxxxx>]

Any idea what this means?
Thread 'Copy message 54 from INBOX' terminated with exception:
Traceback (most recent call last):
   File "/Users/raffi/local/offlineimap/offlineimap/threadutil.py", line 153, 
in run
     Thread.run(self)
   File 
"/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/threading.py",
 line 422, in run
     self.__target(*self.__args, **self.__kwargs)
   File "/Users/raffi/local/offlineimap/offlineimap/folder/Base.py", line 277, 
in copymessageto
     message = self.getmessage(uid)
   File "/Users/raffi/local/offlineimap/offlineimap/folder/IMAP.py", line 164, 
in getmessage
     initialresult = imapobj.uid('fetch', '%d' % uid, '(BODY.PEEK[])')
   File 
"/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/imaplib.py",
 line 725, in uid
     typ, dat = self._simple_command(name, command, *args)
   File 
"/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/imaplib.py",
 line 1028, in _simple_command
     return self._command_complete(name, self._command(name, *args))
   File 
"/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/imaplib.py",
 line 858, in _command_complete
     typ, data = self._get_tagged_response(tag)
   File 
"/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/imaplib.py",
 line 959, in _get_tagged_response
     self._get_response()
   File 
"/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/imaplib.py",
 line 921, in _get_response
     data = self.read(size)
   File 
"/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/imaplib.py",
 line 234, in read
     return self.file.read(size)
   File 
"/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/socket.py",
 line 295, in read
     data = self._sock.recv(recv_size)
MemoryError


No debug messages were logged for Copy message 54 from INBOX.