Midi device not detected

[twainle]

Then you now have solved the problem?

The issue as such, why Jamkazam does not see UMC404HD as a midi device, is not solved.

But yes, it is solved in the sense of doing the flow differently.

I use Reaper to talk with UMC404HD for getting instruments inputs and playing back output (coming from Jamkazam).
Reaper interacts with Jamkazam via ReaRoute which is kind of virtual routing ASIO channels.
That means that in Jamkazam, I select for audio in and out now the channels ReaRoute.
There is no need to add midi device as this is done already with Reaper.