Generating: '/Users/fmagno/projs/sipLab/gnuRadio/tutorials/work/top_block.py'

Executing: /opt/local/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python -u /Users/fmagno/projs/sipLab/gnuRadio/tutorials/work/top_block.py

Traceback (most recent call last):
  File "/Users/fmagno/projs/sipLab/gnuRadio/tutorials/work/top_block.py", line 156, in <module>
    main()
  File "/Users/fmagno/projs/sipLab/gnuRadio/tutorials/work/top_block.py", line 144, in main
    tb = top_block_cls()
  File "/Users/fmagno/projs/sipLab/gnuRadio/tutorials/work/top_block.py", line 118, in __init__
    sample_rate=32000,
  File "/Users/fmagno/projs/sipLab/gnuRadio/tutorials/work/pwm.py", line 75, in __init__
    self.connect((self.sawTooth, 0), (self, 0))
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/gnuradio/gr/hier_block2.py", line 47, in wrapped
    func(self, src, src_port, dst, dst_port)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/gnuradio/gr/hier_block2.py", line 110, in connect
    self.primitive_connect(*args)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/gnuradio/gr/runtime_swig.py", line 5309, in primitive_connect
    return _runtime_swig.top_block_sptr_primitive_connect(self, *args)
ValueError: destination port 0 out of range for Pulse Width Modulation(2)

>>> Done (return code 1)