How to get out of this error

[email protected]:/usr/local/bin$ uhd_fft
linux; GNU C++ version 4.5.2; Boost_104200;
UHD_003.004.003-247-g76f4e4d3

Traceback (most recent call last):
File “/usr/local/bin/uhd_fft”, line 337, in
main ()
File “/usr/local/bin/uhd_fft”, line 333, in main
app = stdgui2.stdapp(app_top_block, “UHD FFT”, nstatus=1)
File
“/usr/local/lib/python2.7/dist-packages/gnuradio/wxgui/stdgui2.py”,
line 38, in init
wx.App.init (self, redirect=False)
File
“/usr/lib/python2.7/dist-packages/wx-2.8-gtk2-unicode/wx/_core.py”,
line 7978, in init
self._BootstrapApp()
File
“/usr/lib/python2.7/dist-packages/wx-2.8-gtk2-unicode/wx/_core.py”,
line 7552, in _BootstrapApp
return core.PyApp__BootstrapApp(*args, **kwargs)
File
“/usr/local/lib/python2.7/dist-packages/gnuradio/wxgui/stdgui2.py”,
line 42, in OnInit
self._max_noutput_items)
File
“/usr/local/lib/python2.7/dist-packages/gnuradio/wxgui/stdgui2.py”,
line 64, in init
self.panel = stdpanel (self, self, top_block_maker, max_nouts)
File
“/usr/local/lib/python2.7/dist-packages/gnuradio/wxgui/stdgui2.py”,
line 86, in init
self.top_block = top_block_maker (frame, self, vbox, sys.argv)
File “/usr/local/bin/uhd_fft”, line 91, in init
otw_format=options.wire_format, args=options.stream_args))
File
“/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/init.py”,
line 116, in constructor_interceptor
return old_constructor(*args)
File
“/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/uhd_swig.py”,
line 2827, in usrp_source
return _uhd_swig.usrp_source(*args)
RuntimeError: LookupError: KeyError: No devices found for ----->

On 11/04/2012 04:05 AM, Vidyadhar Reddy Gosala wrote:

line 38, in init
“/usr/local/lib/python2.7/dist-packages/gnuradio/wxgui/stdgui2.py”,
File “/usr/local/bin/uhd_fft”, line 91, in init


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On many systems, firewall rules prevent the auto-discovery mechanism
from working.

try

uhd_fft --args “addr=ip-addr-of-usrp”

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