Problem with ""

Hi guys,

 I am trying to scan the channel6 of 802.11b with

“”. However it fails with the following error:

Using RX d’board A: TV Rx
Traceback (most recent call last):
File “./”, line 236, in ?
fg = my_graph()
File “./”, line 169, in init
stats = gr.bin_statistics_f(self.fft_size, self.msgq,
AttributeError: ‘module’ object has no attribute ‘bin_statistics_f’

Other example codes run well on my RFX2400. My swig version is 1.3.29.
Gnuradio version 3.0.

Any help is appreciated.