# Tunnel.py Example Error

**URL:** <https://www.ruby-forum.com/t/tunnel-py-example-error/238272>\
**Category:** GNU Radio\
**Created:** [December 30, 2013, 10:28am UTC](https://www.ruby-forum.com/t/tunnel-py-example-error/238272 "2013-12-30T10:28:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\
**Post date:** [December 30, 2013, 10:28am UTC](https://www.ruby-forum.com/t/tunnel-py-example-error/238272/1 "2013-12-30T10:28:03Z")

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Hello,

I am trying out the GNU Radio 3.7.2.1 tunnel.py example in gr-digital.  
Older versions seem to work, but with 3.7.2.1, I get the following:

File “/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/uhd\_swig.py”,  
line 797, in **init**  
this = \_uhd\_swig.new\_tune\_request\_t(\*args)  
NotImplementedError: Wrong number or type of arguments for overloaded  
function ‘new\_tune\_request\_t’.  
Possible C/C++ prototypes are:  
uhd::tune\_request\_t::tune\_request\_t(double)  
uhd::tune\_request\_t::tune\_request\_t(double,double)

How do we fix this?

Thanks,  
Jeremy

---

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**Author:** ![jcanady](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/5f8ce5/32.png) [@jcanady](https://www.ruby-forum.com/u/jcanady)\
**Post date:** [March 31, 2014, 2:56pm UTC](https://www.ruby-forum.com/t/tunnel-py-example-error/238272/2 "2014-03-31T14:56:47Z")

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Hi,  
I am trying out the GNURadio 3.7.1 tunnel.py example.  
I have the same problem .Do you solve it ?

Thanks,  
Tong