Arbitrary or variable numbers of inputs or outputs

Hi list,

Lately I’ve been getting a strange error message when running a python
graph that contains the wfm_rcv_pll block:

Exception RuntimeError: ‘maximum recursion depth exceeded while
calling a Python object’ in <type ‘exceptions.AttributeError’> ignored
USRP Serial: 492605d9
Using d’board B: Basic Rx

gr_fir_ccf: using SSE
Traceback (most recent call last):
File “”, line 291, in
app = stdgui2.stdapp (rds_rx_graph, “USRP RDS RX”)
line 36, in init
wx.App.init (self, redirect=False)
File “/usr/lib/python2.6/dist-packages/wx/”, line 7935, in
File “/usr/lib/python2.6/dist-packages/wx/”, line 7509, in
return core.PyApp__BootstrapApp(*args, **kwargs)
line 39, in OnInit
frame = stdframe (self.top_block_maker, self.title, self._nstatus)
line 60, in init
self.panel = stdpanel (self, self, top_block_maker)
line 81, in init
self.top_block = top_block_maker (frame, self, vbox, sys.argv)
File “”, line 80, in init
self.guts = blks2.wfm_rcv_pll (demod_rate, audio_decim)
line 41, in init
gr.io_signature(1, 2, gr.sizeof_float)) # Output signature
line 42, in init
self._hb = hier_block2_swig(name, input_signature, output_signature)
line 971, in hier_block2_swig
return _gnuradio_swig_py_runtime.hier_block2_swig(*args, **kwargs)
RuntimeError: Hierarchical blocks do not yet support arbitrary or
variable numbers of inputs or outputs (wfm_rcv_pll)

Any ideas?

Dimitris S.
“If you think you’re too small to make a difference, try sleeping with
a mosquito!” - Amnesty International

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