On the Call tab of the element Properties dialog, click on the Synchronize with Parameters button to synchronize the number of arguments in the invocation element with the number of parameters in the associated behavior. This automatically creates or deletes arguments based on the number of parameters in the behavior. If any arguments are to be deleted, Enterprise Architect prompts you to confirm the operation. Click on the Yes button to confirm.
The Synchronize with Parameters button is enabled only if the invocation is associated with a valid behavior, as identified in the Behavior field.