Once an aggregate session file is saved, you can open it using the Class Initialization button in the Aggregate Classes area.
From the Aggregate window, click Class Initialization in the Aggregate Classes area.
In the Class Initialization window, click the Text File tab.
Click Text File.
In the File Selector window, locate and select the aggregate text file, and click Open.
If you want to overwrite the aggregate class, enable the Overwrite existing classes check box.