[srsran-users] ZMQ Address Already in Use Error

[Dan Dole-Muinos]

Hello,

I have been following this
<https://docs.srsran.com/en/latest/app_notes/source/zeromq/source/index.html>
guide,
attempting to get ZMQ virtual radios working within GNU Radio (as is
described in the last section on that guide).

It seems as though when I specify the ports used for the UE and eNB in the
ZMQ sources/sinks in GR, I get an "address already used" error message. If
I try running the flowchart first, I see the same message in the console
output of the UE and eNB. I have ensured ZMQ is indeed installed and seen
by the srsRAN cmake file, and have reinstalled both and tried the ZMQ on GR
steps after a reboot. What am I missing?

GR ZMQ also throws a "no such device" error when setting the address as
localhost, instead, I needed to use 127.0.0.1 as the IP in order to
progress. I am using GR 3.8.3.1, and the latest srsRAN version 21.10.0.

Thanks,
Dan
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