# Problem with ctrlport: called with unregistered key

**URL:** <https://www.ruby-forum.com/t/problem-with-ctrlport-called-with-unregistered-key/245937>\
**Category:** GNU Radio\
**Created:** [July 31, 2013, 1:22am UTC](https://www.ruby-forum.com/t/problem-with-ctrlport-called-with-unregistered-key/245937 "2013-07-31T01:22:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Rafa\_F](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\
**Post date:** [July 31, 2013, 1:22am UTC](https://www.ruby-forum.com/t/problem-with-ctrlport-called-with-unregistered-key/245937/1 "2013-07-31T01:22:40Z")

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Hi list,

I’m trying to use ctrlport on a Ubuntu 13.04 machine and gnuradio  
v3.7.0-82-g179a2d78.

Right after launching a simple flow graph (random source → throttle →   
ofdm  
mod → wx fft sink), a lot of messages pop in the terminal:

Ctrlport Key called with unregistered key (keep\_one\_in\_n0::output %  
full)  
-! 07/30/2013 19:02:59.675 warning: dispatch exception:  
/home/experimento2/gnuradio/gnuradio-runtime/include/gnuradio/rpcserver\_ice.h:119:  
IceUtil::IllegalArgumentException: Ctrlport Key called with unregistered  
key  
(keep\_one\_in\_n0::output % full)

identity: gnuradio  
facet:  
operation: get  
remote host: ::ffff:127.0.0.1 remote port: 41203  
Ctrlport Key called with unregistered key (keep\_one\_in\_n0::output %  
full)  
-! 07/30/2013 19:02:59.675 warning: dispatch exception:  
/home/experiments/gnuradio/gnuradio-runtime/include/gnuradio/rpcserver\_ice.h:119:  
IceUtil::IllegalArgumentException: Ctrlport Key called with unregistered  
key  
(keep\_one\_in\_n0::output % full)

identity: gnuradio  
facet:  
operation: get  
remote host: ::ffff:127.0.0.1 remote port: 41203  
ctrlport-monitor: radio.get threw exception (exception  
::Ice::UnknownException  
{  
unknown =  
/home/experiments/gnuradio/gnuradio-runtime/include/gnuradio/rpcserver\_ice.h:119:  
IceUtil::IllegalArgumentException: Ctrlport Key called with unregistered  
key  
(keep\_one\_in\_n0::output % full)

}).

What I find strange is that the directory /home/experimens/gnuradio/ was  
where I downloaded downloaded the sources. The error continues even  
deleting  
the folder.

Any suggestions ?

–  
View this message in context:  
[http://gnuradio.4.n7.nabble.com/Problem-with-ctrlport-called-with-unregistered-key-tp42837.html](http://gnuradio.4.n7.nabble.com/Problem-with-ctrlport-called-with-unregistered-key-tp42837.html)  
Sent from the GnuRadio mailing list archive at [Nabble.com](http://Nabble.com).

---

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**Author:** ![maiconkist](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/7bcc69/32.png) [@maiconkist](https://www.ruby-forum.com/u/maiconkist)\
**Post date:** [July 31, 2013, 2:18am UTC](https://www.ruby-forum.com/t/problem-with-ctrlport-called-with-unregistered-key/245937/2 "2013-07-31T02:18:10Z")

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On 07/30/2013 04:21 PM, maiconkist wrote:

> Right after launching a simple flow graph (random source → throttle → ofdm  
> mod → wx fft sink), a lot of messages pop in the terminal:

Make sure you have:

[ControlPort]  
on = true  
edges\_list = true

…in your $HOME/.gnuradio/gnuradio.conf.