Hello everyone,

My system config:
Host OS: Windows 10
Guest OS: VirtualBox Ubuntu 20.04.3 LTS
UHD version: 3.15.0.0
GNU Radio version: 3.10.0.0
SDR Device : Ettus USRP N320

I have installed the gnuradio v3.10 recently, after the installation I got the 
below error in a simple QT GUI sink block > Window Type:
[cid:[email protected]]

The error is gone if I enter some integer value in the window type menu. But 
when I tried to build this flowgraph, I am getting the following catch 
exception error:

Console logs:

Generating: '/home/thangz/Desktop/gnuradio/rtlsdr_fm_spectrum_simple.py'
Generate Error: 'catch_exceptions'
>>> Failure
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/gnuradio/grc/gui/Application.py", line 
720, in _handle_action
    generator.write()
  File 
"/usr/lib/python3/dist-packages/gnuradio/grc/core/generator/top_block.py", line 
83, in write
    for filename, data in self._build_python_code_from_template():
  File 
"/usr/lib/python3/dist-packages/gnuradio/grc/core/generator/top_block.py", line 
123, in _build_python_code_from_template
    'catch_exceptions': fg.get_option('catch_exceptions')
  File "/usr/lib/python3/dist-packages/gnuradio/grc/core/FlowGraph.py", line 
182, in get_option
    return self.options_block.params[key].get_evaluated()
KeyError: 'catch_exceptions'
^CTraceback (most recent call last):
  File "/usr/bin/gnuradio-companion", line 92, in <module>
    run_main()
  File "/usr/bin/gnuradio-companion", line 85, in run_main
    exit(main())
  File "/usr/lib/python3/dist-packages/gnuradio/grc/main.py", line 85, in main
    sys.exit(app.run())
  File "/usr/lib/python3/dist-packages/gi/overrides/Gio.py", line 44, in run
    return Gio.Application.run(self, *args, **kwargs)
  File "/usr/lib/python3.8/contextlib.py", line 120, in __exit__
    next(self.gen)
  File "/usr/lib/python3/dist-packages/gi/_ossighelper.py", line 251, in 
register_sigint_fallback
    signal.default_int_handler(signal.SIGINT, None)
KeyboardInterrupt

Is there any fix/solution for this error?


Regard,
Thangaraj

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