[Discuss-gnuradio] strange problem with packet sink

[Josh Stevens]

Hey all,
   The benchmark_rx.py file uses the generic_mod_demod.py and on the receiver side to be specific generic_demod whose input is
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature    and the output signature is 
gr.io_signature(1, 1, gr.sizeof_char))       # Output signature . 
It also uses gr_framer_sink_1.cc which is for the basic benchmark purposes.
   What i am currently working with is a modified packet structure at the transmitter side keeping the modulation- demodulation of the system intact but a slight modification in the way it is received. I placed a packet sink giving it the default_access_code , the msg_queue and the required threshold , but the problem comes in when the demodulation with a "CHAR" outpout signature is connected to a packet_sink whose signtaures are : 
    gr_make_io_signature (1, 1, sizeof(float)), #input signature
    gr_make_io_signature (0, 0, 0)),               #output signature

I didnt realise it at first when i did the usual self.connect(self ,self._demodulator , self._packet_sink) at the receiver side ,
and i get a TypeError : Itemsize mismatch error . Is there another alternative to this or would i have to create another packet_sink according to my requirements ?

Thanks,
Joshua.