To add a reference Interaction do the following:
Precondition: A Sequence Diagram exists in a package and it is opened.
From project browser right click package→Add Element…
Toolset: “
SysML” “
SysML 1.5 Interaction”; Type:“Interaction”. Give a name.
Save and Exit
An Interaction is created and its Diagram initiated.
Drag the new diagram from browser to the opened Sequence Diagram. A pop up window will be presented
Drop Diagram As… → Interaction Occurrence→ OK