Traceback (most recent call last):


 "scriptHandler.pyc", line 187, in executeScript


 "documentBase.pyc", line 179, in script_previousRow


 "documentBase.pyc", line 167, in _tableMovementScriptHelper


 "virtualBuffers\gecko_ia2.pyc", line 327, in _getTableCellAt
AttributeError: 'NoneType' object has no attribute 'IAccessibleTableObject'

Traceback (most recent call last):


 "/usr/lib64/python2.7/site-packages/mars/promise.py", line 294, in _wrapped

return func(*args, **kwargs)


 "/usr/lib64/python2.7/site-packages/mars/utils.py", line 287, in _wrapped

return func(*args, **kwargs)


 "/usr/lib64/python2.7/site-packages/mars/scheduler/assigner.py", line 288, in _allocate_resource

input_sizes = dict((k, meta.chunk_size) for k, meta in metas.items())


 "/usr/lib64/python2.7/site-packages/mars/scheduler/assigner.py", line 288, in <genexpr>

input_sizes = dict((k, meta.chunk_size) for k, meta in metas.items())
AttributeError: 'NoneType' object has no attribute 'chunk_size'
