I'm using the HyperLynx SI GHz pkg. Creating a LineSim free-form schematic, need to couple some T-Lines to create differential line but the t-line select right-mouse 'coupled' is greyed out. I've selected all the setup licenses but still t-line couple is greyed out. Read the LineSim User Guide page 143, Right-click>Couple but it's greyed out. I did discover, from Ian Dodds "HyperLynx Quick Tour" webcast GHz chapter that if I select a transmissin-line then control+left mouse select a second T-line the Couple is not greyed out. Subsequently knowing this now I think this might of been what the user guide might of been saying but it reads more like how to select and unselect using other t-lines. So what is the method in LineSim to couple t-lines?
Note on right-mouse selecting a t-line the edit is limited to only two tabs: type and Values.