Oh, I see. You have separate sources connected to the same addsub block. It's telling you that you need to use timed stream commands to start the stream, or else you will see undefined behavior. Personally I think that error should be demoted to a warning -- anyone from Ettus want to chime in?
On Tue, Sep 3, 2019 at 3:53 PM Quadri,Adnan <adnan.qua...@louisville.edu> wrote: > Hello, > > Thank you for your prompt response. I have connected both the addsub > output to two QT Gui Sink but I still get the same error. I have the Copy > block in the middle as well. > > I am attaching a screenshot of my flowgraph. I tried with different USRP > sources/Signal Sources as well. But it is the same error. > > Thanks, > Adnan > > ------------------------------ > *From:* Nick Foster <bistrom...@gmail.com> > *Sent:* Tuesday, September 3, 2019 3:57 PM > *To:* Quadri,Adnan <adnan.qua...@louisville.edu> > *Cc:* usrp-users@lists.ettus.com <usrp-users@lists.ettus.com> > *Subject:* Re: [USRP-users] Addsub HLS Block Error > > I ran into this the other day and it's independent of the HLS component of > the addsub block (since the interface is identical). You need to connect > both outputs of the addsub block to something, even a null sink. I'm pretty > sure this wasn't the intended behavior and also pretty sure that it wasn't > like this last time I checked (which was more than a year ago), so maybe it > should be filed as a bug. > > Nick > > On Tue, Sep 3, 2019 at 1:48 PM Quadri,Adnan via USRP-users < > usrp-users@lists.ettus.com> wrote: > > Hello, > > We are trying to run the RFNoC addsub HLS block. > > I was able to build the FPGA Image and made sure in the noc_block verilog > code to point to the HLS implementation for addsub block on RFNoC as > opposed to the verilog/VHDL implementation. > > But when we run the example Flowgraph with two signal source as input to > the two inputs for addsub block on GRC, we get the following error - > > ERROR: > thread[thread-per-block[4]: <block uhd_rfnoc_AddSub (1)>]: RuntimeError: > Invalid recv stream command - stream now on multiple channels in a single > streamer will fail to time align. > > Does this have anything to do with the C++ code for HLS implementation or > is it a problem at UHD level? > > Thanks, > Adnan > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > <https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.ettus.com_mailman_listinfo_usrp-2Dusers-5Flists.ettus.com&d=DwMFaQ&c=OAG1LQNACBDguGvBeNj18Swhr9TMTjS-x4O_KuapPgY&r=JoNl3b2Pn0MHhs668QvjpcSGl6s3MEmtJLBypH6x02U&m=XH0fqWeFmcl-P0_Y01iOhbHXEKDsJDUBaImT_nfh0t4&s=_hsJH03rqnDSUZXWGyx31-8I7HJLsU5_S5hs-j5_WRw&e=> > >
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