Make sure both traces have the profile numbers going same direction.
2. Right click on Node 12, and press delete.
3.Right click on Node 13 and press “add section”
4. click on node 11 to create a section between nodes 11 and 13.
You have now created a section between these two traces, and can now join them.
5. Right click on Node 11, and press “Join trenches”
Trenches are now combined to one trace.
6.Right click on first node at profile 0, and press “renumber trench”