How to determine if OSC Server actually opened UDP Port?

In my project I use an OSC server. Today it didn’t work and after a bit of debugging I discovered that port number was used by another application (a C++ OSC tester/listener).
Now I’m wondering: how can I say if my OSC server correctly opened the UDP port? I though “IsValid” could be a path, but it isn’t so - OSC server results valid even if the UDP port is already opened by someone other.
I would like my UE application to log an error if it can’t open that poet.

Ok. Posting a question usually brings you to the answer by yourself in a small ΔT… For the sake of others having the same question I post the solution.
Test the OSC Server property “IsActive”.
:roll_eyes: