Here is the error.
cogwsn@cogwsn-desktop:/usr/local/bin$ uhd_fft.py
linux; GNU C++ version 4.4.3; Boost_104000; UHD_003.002.003-583c762
– Opening a USRP2/N-Series device…
– Current recv frame size: 1472 bytes
– Current send frame size: 1472 bytes
Traceback (most recent call last):
File “/usr/local/bin/uhd_fft.py”, line 267, in
main ()
File “/usr/local/bin/uhd_fft.py”, line 263, in main
app = stdgui2.stdapp(app_top_block, “UHD FFT”, nstatus=1)
File
“/usr/local/lib/python2.6/dist-packages/gnuradio/wxgui/stdgui2.py”,
line 36, in init
wx.App.init (self, redirect=False)
File
“/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/_core.py”,
line 7978, in init
self._BootstrapApp()
File
“/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/_core.py”,
line 7552, in _BootstrapApp
return core.PyApp__BootstrapApp(*args, **kwargs)
File
“/usr/local/lib/python2.6/dist-packages/gnuradio/wxgui/stdgui2.py”,
line 39, in OnInit
frame = stdframe (self.top_block_maker, self.title, self._nstatus)
File
“/usr/local/lib/python2.6/dist-packages/gnuradio/wxgui/stdgui2.py”,
line 60, in init
self.panel = stdpanel (self, self, top_block_maker)
File
“/usr/local/lib/python2.6/dist-packages/gnuradio/wxgui/stdgui2.py”,
line 81, in init
self.top_block = top_block_maker (frame, self, vbox, sys.argv)
File “/usr/local/bin/uhd_fft.py”, line 70, in init
num_channels=1)
File
“/usr/local/lib/python2.6/dist-packages/gnuradio/uhd/init.py”,
line 74, in constructor_interceptor
return old_constructor(*args, **kwargs)
File
“/usr/local/lib/python2.6/dist-packages/gnuradio/uhd/uhd_swig.py”,
line 1856, in usrp_source
return _uhd_swig.usrp_source(*args, **kwargs)
RuntimeError: RuntimeError:
Please update the firmware and FPGA images for your device.
See the application notes for USRP2/N-Series for instructions.
Expected FPGA compatibility number 7, but got 6:
The FPGA build is not compatible with the host code build.
I re-run the script in the same PC.I went to the folder
usr/local/share/uhd/image
I saw a tag 003.001.002 while the latest release is 003.002.003 at
http://files.ettus.com/uhd_releases/master_images/
In another PC I re-run the script and before that I deleted that UHD
folder.Now the tag is missing.Cant say which version.
Anyways my problem has solved after I burnt my SD card with the latest
release 
Marcus D. Leech wrote:
–
Discuss-gnuradio Info Page
Sumit Kr.
Research Assistant
Communication Research center
IIIT Hyderabad
India
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