Hi
I effectively proposed Mike to remove the cache.json file, in case it
could help. As I thought this was probably not the solution I sent him a
private email and asked him to answer to the list in case of success.
So to resume; it appears that the problem originates from simply
upgrading GNURadio installed from PPA.
Question: should we fire an issue on Github? I think that this cache
problem should be solved by cleaning the cache each time GR is updated
or its version is changed (some users may also downgrade GR in some case)
Regards, Christophe
On 25/04/2021 15:06, Mike Markowski wrote:
With thanks to Christophe for his excellent advice, removing
~/.cache/grc_gnuradio/cache.json fixed things up. After needing to do
this now & then, I have a new gr heuristic:
if (weirdnessReigns) { delete cache.json; }
Thanks, Christophe!
Mike
On 4/24/21 2:55 PM, Mike Markowski wrote:
Some progress. When I log in as another user, gr runs fine with a
usrp. Logging in as me, I get the errors previously posted. My
environment seems to (suddenly) be the issue, so I:
1. Moved ~/.bashrc to a new name to avoid any improper env var settings.
2. Moved ~/.config/GNU\ RADIO
But I still get errors previously posted. Are there other files
gnuradio-companion is looking at that could be the culprit?
Thanks,
Mike
On 4/24/21 1:04 PM, Mike Markowski wrote:
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
