Yup! That was the issue.  Thanks for he quick reply!

Carlos

On Oct 20, 2019, at 8:11 PM, Michael Dickens 
<michael.dick...@ettus.com<mailto:michael.dick...@ettus.com>> wrote:

Hi Carlos - The issue is with the USRP source block. If you open up its options 
in GRC, under the tab "FE Corrections", there are 2 entries (IQ Balance and DC 
Offset), both of which are probably double quotes ("") ... these should be 
Python booleans, so True or False depending on if you want to use the option or 
not. Hopefully changing them to True or False will take care of your issue. - 
MLD

On Sun, Oct 20, 2019 at 6:00 PM Carlos Velazquez 
<cvel...@hotmail.com<mailto:cvel...@hotmail.com>> wrote:
I am running macOS 10.14.6 and grc 3.7.13.5.  After troubleshooting the missing 
variable error in gr-ieee802 after a macport update, I now have the following 
error:

Traceback (most recent call last):
  File “~/Documents/Research/gr-ieee802-11/examples/wifi_rx.py", line 380, in 
<module>
    main()
  File “~/Documents/Research/gr-ieee802-11/examples/wifi_rx.py", line 368, in 
main
    tb = top_block_cls()
  File “~/Documents/Research/gr-ieee802-11/examples/wifi_rx.py", line 152, in 
__init__
    self.uhd_usrp_source_0.set_auto_dc_offset("", 0)
  File 
"/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/gnuradio/uhd/uhd_swig.py",
 line 3582, in set_auto_dc_offset
    return _uhd_swig.usrp_source_sptr_set_auto_dc_offset(self, enb, chan)
TypeError: in method 'usrp_source_sptr_set_auto_dc_offset', argument 2 of type 
'bool'

The loopback block runs fine. It seems UHD may have changed? Anyone having the 
problem? I tried to upgrade gr to 3.8 but macports is only fetching 3.7

v/r,

Carlos
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--
Michael Dickens
Ettus Research Technical Support
Email: supp...@ettus.com<mailto:supp...@ettus.com>
Web: https://ettus.com/

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