Re: USRP UHD Source problem

Thanks for checking, Christophe. I agree that it's strange. I've been
away from gnuradio doing some cyclostationary work, so haven't touched
any flowgraphs in weeks. I see that my newest flowgraphs were built
April 7 and that gnuradio-companion, no doubt after an Ubuntu upgrade,
shows a date of April 9.

I'll share debugging breakthroughs, but would be glad to hear from
others if your GR 3.8.1.0 is or isn't running fine. Most likely, it's
my environment since I don't see a flurry of 'me too' notes.

Mike

On 4/24/21 12:16 PM, Christophe Seguinot wrote:
> This flowgraph is correctly build under GR 3.9.0.0 (no USRP source to
> test further)
>
> The error is quite strange, I think there is no "len_tag_name" parameter
> in such a simple flowgraph
>
> On 24/04/2021 16:35, Mike Markowski wrote:
>> I'm running gnuradio companion 3.8.1.0 (Python 3.8.6) on Ubuntu
>> 2020.10.  After a few weeks away from gnuradio, today I get errors
>> with the USRP UHD Source, and previously working flowgraphs no longer
>> build. (Previously built flowgraph python files still run fine.)  The
>> attached flowgraph doesn't get much simpler, but building yields:
>>
>> Generating: '/home/mm/sdr/fm/uhdTest.py'
>> Generate Error: (NameError("'len_tag_name' is not defined"),
>> 'uhd.usrp_source(\n    ",".join((${dev_addr}, ${dev_args})),\n
>> uhd.stream_args(\n        cpu_format="${type}",\n
>>
>> [... on and on ...]
>>
>> , uhd.ALL_MBOARDS)\n% else:\n# No synchronization enforced.\n% endif\n')
>> >>> Failure
>> Traceback (most recent call last):
>>   File "memory:0x7f3082ab36d0", line 136, in render_body
>>   File "/usr/lib/python3/dist-packages/mako/runtime.py", line 106, in
>> __getitem__
>>     return compat_builtins.__dict__[key]
>> KeyError: 'len_tag_name'
>>
>> [... still more...]
>>
>> Is anyone else seeing this error?
>>
>> Thanks,
>> Mike
>