Re: [Discuss-gnuradio] "Could not find port: cfg in:" error

[Jason Matusiak]

I got it.  It was a problem with my XML I included.  I had to change the 
top of the file to:
  <name>RFNoC: FrequencyShift</name>
  <key>multiaperture_freqShift</key>
  <category>multiaperture</category>
  <import>import multiaperture</import>
  <make>multiaperture.freqShift(
          self.device3,
          uhd.stream_args( # TX Stream Args
        cpu_format="fc32", \# TODO: This must be made an option
        otw_format="sc16",
        args="spp={}".format($spp),
          ),
          uhd.stream_args( # RX Stream Args
        cpu_format="fc32", \# TODO: This must be made an option
        otw_format="sc16",
        args="",
          ),
          $block_index,
          $device_index
)

Now it seems to be happy again.



On 06/12/2017 08:10 AM, Jason Matusiak wrote:
> This is the same problem I had once before, but I am not sure why I 
> can't fix it this time.  I have an RFNoC OOT module that wants to have 
> a msg port input.  I called this port 'cfg'.
>
> Attached is my freqShift_impl.cc file where I declare the message port 
> "cfg".  I also included multiaperture_freqShift.xml where the port 
> gets declared as a sink.
>
> When I make and make install, everything seems to run fine.  I do a 
> sudo ldconfig, and then refresh GRC.  When I build it is happy, then 
> when I run I get the following error:
>
> Could not find port: cfg in:
> rfnoc
> system
>
> Traceback (most recent call last):
>   File "/home/jmat/rfnoc-ma/examples/CPremoval.py", line 278, in <module>
>     main()
>   File "/home/jmat/rfnoc-ma/examples/CPremoval.py", line 266, in main
>     tb = top_block_cls()
>   File "/home/jmat/rfnoc-ma/examples/CPremoval.py", line 219, in __init__
>     self.msg_connect((self.qtgui_edit_box_msg_1, 'msg'), 
> (self.uhd_rfnoc_streamer_freqShift_0, 'cfg'))
>   File 
> "/home/jmat/rfnoc/lib/python2.7/dist-packages/gnuradio/gr/hier_block2.py", 
> line 59, in wrapped
>     func(self, src.to_basic_block(), srcport, dst.to_basic_block(), 
> dstport)
>   File 
> "/home/jmat/rfnoc/lib/python2.7/dist-packages/gnuradio/gr/hier_block2.py", 
> line 131, in msg_connect
>     self.primitive_msg_connect(*args)
>   File 
> "/home/jmat/rfnoc/lib/python2.7/dist-packages/gnuradio/gr/runtime_swig.py", 
> line 3489, in primitive_msg_connect
>     return _runtime_swig.top_block_sptr_primitive_msg_connect(self, 
> *args)
> RuntimeError: invalid msg port in connect() or disconnect()
>
> >>> Done
>
> The last time I had this issue with a block it was because I didn't 
> make the changes to my .cpp and .h files, but I did that this time. 
> What else could I be missing???