# Narrowband Tunnel.py Error **URL:** \ **Category:** GNU Radio\ **Created:** [July 24, 2014, 11:17pm UTC](https://www.ruby-forum.com/t/narrowband-tunnel-py-error/231171 "2014-07-24T23:17:31Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Post date:** [July 24, 2014, 11:17pm UTC](https://www.ruby-forum.com/t/narrowband-tunnel-py-error/231171/1 "2014-07-24T23:17:31Z")
I am currently running GNU Radio 3.7.4 and I am getting an error running the stock narrowband tunnel.py script. This is what I am getting: [root@cobra narrowband]# ./tunnel.py -f 146.0M -a addr=“10.2.8.104” linux; GNU C++ version 4.4.7 20120313 (Red Hat 4.4.7-4); Boost\_104100; UHD\_003.007.001-64-g92b0b7ab Using Volk machine: sse4\_2\_64 – Opening a USRP2/N-Series device… – Current recv frame size: 1472 bytes – Current send frame size: 1472 bytes UHD Warning: The recv buffer could not be resized sufficiently. Target sock buff size: 50000000 bytes. Actual sock buff size: 5000000 bytes. See the transport application notes on buffer resizing. Please run: sudo sysctl -w net.core.rmem\_max=50000000 UHD Warning: The recv buffer could not be resized sufficiently. Target sock buff size: 50000000 bytes. Actual sock buff size: 5000000 bytes. See the transport application notes on buffer resizing. Please run: sudo sysctl -w net.core.rmem\_max=50000000 – Detecting internal GPSDO… Found an internal GPSDO – found – Setting references to the internal GPSDO – Initializing time to the internal GPSDO No gain specified. Setting gain to 19.000000 (from [0.000000, 38.000000]) Traceback (most recent call last): File “./tunnel.py”, line 296, in main() File “./tunnel.py”, line 259, in main options) File “./tunnel.py”, line 103, in **init** options.verbose) File “/home/fox/Documents/GNU\_radio/Cranial/narrowband/uhd\_interface.py”, line 199, in **init** freq, lo\_offset, gain, spec, antenna, clock\_source) File “/home/fox/Documents/GNU\_radio/Cranial/narrowband/uhd\_interface.py”, line 70, in **init** self.\_freq = self.set\_freq(freq, lo\_offset) File “/home/fox/Documents/GNU\_radio/Cranial/narrowband/uhd\_interface.py”, line 120, in set\_freq r = self.u.set\_center\_freq(uhd.tune\_request(freq, lo\_offset)) File “/usr/local/lib64/python2.6/site-packages/gnuradio/uhd/ **init**.py”, line 52, in **init** super(tune\_request\_t, self). **init** (\*args) File “/usr/local/lib64/python2.6/site-packages/gnuradio/uhd/uhd\_swig.py”, line 792, in **init** this = \_uhd\_swig.new\_tune\_request\_t(\*args) NotImplementedError: Wrong number of arguments for overloaded function ‘new\_tune\_request\_t’. Possible C/C++ prototypes are: uhd::tune\_request\_t(double) uhd::tune\_request\_t(double,double) I am not too sure what to do, I have looked up the error but I couldn’t find a solution. Anyone know what to do? Also, the benchmark scripts work, it is just the tunnel script that doesn’t. Thanks Jonathan ---
**Author:** ![jfaulkenberry](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/c2a13f/32.png) [@jfaulkenberry](https://www.ruby-forum.com/u/jfaulkenberry)\ **Post date:** [July 25, 2014, 1:11am UTC](https://www.ruby-forum.com/t/narrowband-tunnel-py-error/231171/2 "2014-07-25T01:11:23Z")
Try adding ‘–lo-offset=10e6’ as a commandline argument. Thanks for the bug report, I’ll push a fix asap. FYI, the tunnel.py script has been superseded by gr-mac: > **[GitHub - balint256/gr-mac: Easy-to-use MAC-layer implementations for GNU Radio.](https://github.com/balint256/gr-mac)** > > Easy-to-use MAC-layer implementations for GNU Radio. - GitHub - balint256/gr-mac: Easy-to-use MAC-layer implementations for GNU Radio. Mike – Mike J. M0MIK BSc MIET Ettus R. Technical Support Email: removed\_email\_address@domain.invalid Web: [http://ettus.com](http://ettus.com) On Thu, Jul 24, 2014 at 10:15 PM, Jonathan F. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![jfaulkenberry](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/c2a13f/32.png) [@jfaulkenberry](https://www.ruby-forum.com/u/jfaulkenberry)\ **Post date:** [July 25, 2014, 1:44am UTC](https://www.ruby-forum.com/t/narrowband-tunnel-py-error/231171/3 "2014-07-25T01:44:30Z")
Thanks for the response. A colleague of mine recommended going into the uhd\_interface file and change the self.u.set\_center\_freq() and not use the lo\_offset as a parameter. Then again it couldn’t hurt to just add the command line argument. Thank you for the gr-mac link, it is within my interests to use it. Jonathan On Thu, Jul 24, 2014 at 7:09 PM, Mike J. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![jfaulkenberry](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/c2a13f/32.png) [@jfaulkenberry](https://www.ruby-forum.com/u/jfaulkenberry)\ **Post date:** [July 25, 2014, 10:29pm UTC](https://www.ruby-forum.com/t/narrowband-tunnel-py-error/231171/4 "2014-07-25T22:29:44Z")
On Fri, Jul 25, 2014 at 1:13 PM, Tom R. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > Thank you for the gr-mac link, it is within my interests to use it. > > > > > Using Volk machine: sse4\_2\_64 > > > > > > > > “/home/fox/Documents/GNU\_radio/Cranial/narrowband/uhd\_interface.py”, line > > > > File > > > > uhd::tune\_request\_t(double) > > > > > > > > * * * > > > > [Discuss-gnuradio Info Page](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio) I did try the --lo-offset=10e6 argument and it didn’t work. I may just have to tweak the self.u.set\_center\_freq to not have the uhd.tune\_request because it doesn’t work just as self.u.set\_center\_freq(uhd.tune\_request(freq)). I know the latest version of GNU Radio has a burst tagger block, so is the gr-mac project already incorporated? ---
**Author:** ![jfaulkenberry](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/c2a13f/32.png) [@jfaulkenberry](https://www.ruby-forum.com/u/jfaulkenberry)\ **Post date:** [July 25, 2014, 7:14pm UTC](https://www.ruby-forum.com/t/narrowband-tunnel-py-error/231171/5 "2014-07-25T19:14:48Z")
On Thu, Jul 24, 2014 at 7:42 PM, Jonathan F. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Best to focus on using gr-mac. Getting started with it might be a bit difficult, but it’s far superior to tunnel.py and where we want to go, anyways. GNU Radio will hopefully be adopting this in the future, too, and removing tunnel.py. Tom ---
**Author:** ![jfaulkenberry](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/c2a13f/32.png) [@jfaulkenberry](https://www.ruby-forum.com/u/jfaulkenberry)\ **Post date:** [July 27, 2014, 5:03pm UTC](https://www.ruby-forum.com/t/narrowband-tunnel-py-error/231171/6 "2014-07-27T17:03:16Z")
On Fri, Jul 25, 2014 at 4:28 PM, Jonathan F. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > argument. > > > > > > Web: [http://ettus.com](http://ettus.com) > > > > > > > > > UHD\_003.007.001-64-g92b0b7ab > > > > > See the transport application notes on buffer resizing. > > > > > – Setting references to the internal GPSDO > > > > > options.verbose) > > > > > 120, in set\_freq > > > > > ‘new\_tune\_request\_t’. > > > > > Jonathan > > I did try the --lo-offset=10e6 argument and it didn’t work. I may just > have to tweak the self.u.set\_center\_freq to not have the uhd.tune\_request > because it doesn’t work just as > self.u.set\_center\_freq(uhd.tune\_request(freq)). > > I know the latest version of GNU Radio has a burst tagger block, so is the > gr-mac project already incorporated? No. As I said, we will hopefully be adopting it in the future, but it is still a separate project. And the burst tagger block has been in GNU Radio for quite some time. Tom