In the previous GRC you posted, there is a "Wave Select" Python block with no inputs or outputs. I don't think we have enough info to figure out what you are doing. As Paul Atreides mentioned, posting a full GRC would help.
On Tue, Sep 26, 2023 at 10:36 PM Elmore Family <wa4...@comcast.net> wrote: > Paul, > > Thanks for answering. The following is what I hope is a simplified > presentation of my code that is pertinent to the issue. The top flowgraph > is complex. The FT8_Receive hier block is simple. The connections section > below should be sufficient for explaining it. > > I am using a gnu radio flowgraph to attempt to select the appropriate > Selector Block output as explained below. The following error occurs when I > run the flowgraph: Index Error: output_index must be < noutputs. > > Obviously the chosen index of 1 is less than the number of outputs 2. What > is wrong? > > The following code is in an FT8_Receive hier block. It shows only the code > pertinent to the issue I am experiencing. The connections section shows the > Selector Block with 2 outputs connected to 2 Wave File Sinks. I am > attempting to select the appropriate output by using wave_select in the > output index as shown in def set_wave_select(). > > class FT8_Receive(gr.hier_block2): > def __init__(self, wave_select=0): > gr.hier_block2.__init__( > self, "FT8_Receive", > gr.io_signature(1, 1, gr.sizeof_float*1), > gr.io_signature(0, 0, 0), > ) > > ################################################## > # Parameters > ################################################## > self.wave_select = wave_select > > ################################################## > # Connections > ################################################## > self.connect((self.blocks_selector_0, 1), (self.blocks_wavfile_sink_0_0, > 0)) > self.connect((self.blocks_selector_0, 0), > (self.blocks_wavfile_sink_0_0_0, 0)) > self.connect((self, 0), (self.rational_resampler_xxx_0, 0)) > self.connect((self.rational_resampler_xxx_0, 0), (self.blocks_selector_0, > 0)) > > ................................. > > def get_wave_select(self): > return self.wave_select > > def set_wave_select(self, wave_select): > self.wave_select = wave_select > self.blocks_selector_0.set_output_index(self.wave_select) > > The following code is from the .py file that is an OOT in the top block of > the flowgraph. This is where I am calling set_wave_select. > > from FT8_Receive import FT8_Receive > > RCV = FT8_Receive() > wave_select = 1 > RCV.set_wave_select(wave_select) > > > *From:* Paul Atreides > *Sent:* Tuesday, September 26, 2023 6:40 PM > *To:* Elmore's > *Cc:* discuss-gnuradio@gnu.org > *Subject:* Re: Index Error: output_index < noutputs > > Jim, can you please re-post your flowgraph? > I’ll try to take another look at it. > Also, what version of GNURadio are you using? > > <end transmission> > > On Sep 26, 2023, at 11:48, Elmore's <wa4...@comcast.net> wrote: > > > I have submitted this issue previously and received a response which > resulted in my trying several things which didn’t work. > > I then submitted the issue to Stackoverflow and received no answers. > > I get this error when I try to use a Selector to select one of 2 outputs > with my selection obviously being smaller than the number of outputs. I can > successfully use a Selector if I use a number for the output index or a > variable whose value is selected by a Toggle Button but not if I try to set > the variable programmatically in Python. > > In general, why do you get such an error? I am asking the question in > this manner because my specific questions relating to my code and flowgraph > have not resulted in any concrete answers (or any answers at all). > > Thanks again for any help. I have been struggling with this for several > weeks. > > Jim > > > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > Virus-free.www.avg.com > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > >
