Hi Walter,
if i left click on a node, the node is getting selcted:

On a node with additional ports, when i click on a port, then the whole corresponding node is getting selected too:

Is there a way, that i can prevent a node getting selected when i click on one of its outer ports?
I had a look at the “Dynamic Ports” sample and moreless copied it. - But there it also behaves like this: (Clicked on Red Bottom Port)

Many thanks meanwhile, Hannes