Re:[Discuss-gnuradio] Problem in using trellis Error correction en- and decoder

[Francisco Llaryora]

Hello Achilleas.
Forgiveness for mysticism about the example.
is interference_cancellation.grc  (GNU Radio Companion 3.2.2)
http://pastebin.com/N61P7tiP
/usr/share/gnuradio/examples/grc/trellis/interference_cancellation.grc

the error:
[error]
Loading: 
"/usr/share/gnuradio/examples/grc/trellis/interference_cancellation.grc"
>>> Done

Showing: 
"/usr/share/gnuradio/examples/grc/trellis/interference_cancellation.grc"

Generating: "/usr/share/gnuradio/examples/grc/trellis/int_cancellation.py"
>>> Warning: This flow graph may not have flow control: no audio or usrp blocks 
>>> found. Add a Misc->Throttle block to your flow graph to avoid CPU 
>>> congestion.

Generating: "/usr/share/gnuradio/examples/grc/trellis/int_cancellation.py"
>>> Warning: This flow graph may not have flow control: no audio or usrp blocks 
>>> found. Add a Misc->Throttle block to your flow graph to avoid CPU 
>>> congestion.

Executing: "/usr/share/gnuradio/examples/grc/trellis/int_cancellation.py"

terminate called after throwing an instance of 'std::runtime_error'
 what():  fsm::fsm(const char *name): file open error
>>> Done
[/error]

i change the path to absolute path, but don't work.
the file exist in this directory. i no try to add a Throttle block.

i do not care if the example doesn't work, be cause i don't get this
error in my work.
I must have to go now. sorry.
thanks for the fast reply.