Re: [Discuss-gnuradio] GNUradio companion error message

[Michael Dickens]

Hi John_w_g - The error you're encountering indicates that the version of UHD 
isn't compatible with the version of gr-uhd -- which is part of the overall GNU 
Radio install. I'd guess that GNU Radio was installed, and then UHD was 
updated. Generally the solution is to reinstall GNU Radio while keeping the 
version of UHD stable. When you update UHD, do it first then update GNU Radio 
to make sure API compatibility is maintained. Thus, the main question is: how 
are UHD and GNU Radio installed? What version of UHD is installed (GR is at 
3.7.9 according to your note)? Hope this is useful! - MLD

On Tue, Oct 16, 2018, at 2:16 PM, John_w_g wrote:
> Attached is my simple tone_test loopback flow graph, and the system error 
> that is output when I run it.  I have verified correct driver operation by 
> running uhd_usrp_probe (output also attached).  I am running Ubuntu 16.04.5 
> and GRC 3.7.9
> 
> I was previously able to run GRC without this error.  I did an OS update that 
> was advertised.  After the update I received this error (I do not know if it 
> was related).  I ran uhd_usrp_probe and it complained that I had the wrong 
> FPGA version, so I re-ran the FPGA downloader and updated the image,  after 
> that uhd was happy, but this error persists.