Hello dear all,
I created testing data for Trace network. I had lot of issue in my data but after cleaning, I think data are OK. These are simple data of River basin our river Bečva.
But although I solved issues in topology, I am still not able to make nice Downstream Trace. Tool always select only one feature. I feel lost, probably this is issue somewhere in my data. Can someone help me?

I attached my project and I would really appreciate it if someone could help me.
Many thanks and stay save,
David.