Error in finding the incoming and outgoing connections of an Activity Object using Inbuilt Function 'getConnections'

Hi,

I want to find the incoming and outgoing connections of objects of type 'Activity'. Have searched in the  ARIS help, I found one function 'getConnections' but when I'm executing the report i'm getting the error as below.Also I observed there is one Macro class named 'ConnectableDef' that we pass as a parameter to the function 'getConnections' , but then too I'm getting the error.Can anyone help me out to resolve this?Thanks in advance.