Inkyu,
At least in 3.9.4 that could be a sequence number error (
https://github.com/EttusResearch/uhd/blob/release_003_009_004/host/lib/usrp/common/async_packet_handler.hpp#L62).
Odd that you're seeing that with USB. Not really sure how to help you with
that part.
-Dave
On Tue, Apr 24, 2018 at 6:09 AM, Inkyu Bang <inkyu...@gmail.com> wrote:
> Hi,
>
> I am trying to use two USRP (B210) in one laptop.
> I plan to send signals using two USRPs from the same source.
>
> When I tried to separately run ".grc" file in each terminal, it works
> correctly.
> However, when I tried to add one more "UHD: USRP sink" block in GRC.
>
> It shows an exception message "S" and only one USRP works.
>
> Could anyone help me to solve this problem?
>
> (1) What is the meaning of "S"?
> O: overflow, U: underflow, but I don't know what this is.
>
> (2) Is there any way to use multiple "UHD: USRP sink" blocks in one
> machine?
>
> Thank you,
> Regards,
>
> Inkyu Bang
>
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