IPython abort error

In [220]: ar=lview.apply_async(sleep,10)

In [221]: ar.abort()
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (97, 0))

---------------------------------------------------------------------------
TimeoutError                              Traceback (most recent call last)
/Users/maarten/<ipython-input-221-1ece39e2ac75> in <module>()
----> 1 ar.abort()

/Library/Python/2.6/site-packages/ipython-0.11-py2.6.egg/IPython/parallel/client/asyncresult.pyc in abort(self)
    195         """abort my tasks."""
    196         assert not self.ready(), "Can't abort, I am already done!"
--> 197         return self.client.abort(self.msg_ids, targets=self._targets, block=True)
    198
    199     @property

/Users/maarten/<string> in __getattr__(self, key)

/Library/Python/2.6/site-packages/ipython-0.11-py2.6.egg/IPython/parallel/client/asyncresult.pyc in check_ready(f, self, *args, **kwargs)
     35     self.wait(0)
     36     if not self._ready:
---> 37         raise error.TimeoutError("result not ready")
     38     return f(self, *args, **kwargs)
     39