Cannot update connector

[msdb]

In my C# program i have a method that should create a connector between two elements but it's throwing this error:

An unhandled exception of type 'System.Runtime.InteropServices.COMException' occurred in SparxProject.exe

Additional information: Cannot update connector as either the Start or the End object is NULL

The method:

Code: [Select]

static void LinkToSuperDepartment(Element subDepartmentOrEmployee, int superDepartment)
        {
            Connector aggregationConnector = subDepartmentOrEmployee.Connectors.AddNew("", "Connector");
            aggregationConnector.Type = "Aggregation";
            aggregationConnector.Stereotype = "Archimate2::ArchiMate_Aggregation";
            aggregationConnector.ClientID = subDepartmentOrEmployee.ElementID;
            aggregationConnector.SupplierID = superDepartment;
            aggregationConnector.Direction = "Source -> Destination";
            aggregationConnector.Update();

        }
The error occurs when Update() is called.

Do ClientID and SupplierID not specify the start and end objects of the connector?

[Geert Bellekens]

You don't have to set the clientID, that is set automatically because you add it to SubDepartmentOrEmployee.
But you have to make sure that superDepartment actually points to an existing element (that is already been saved)

Geert

[msdb]

Okay, I see my mistake now. Thank you.