If you used VisualAge Standard, you must generate runtime code for all applications that you migrate to Version 6.0.
To accomplish this, select your application in the VisualAge Organizer window and select Generate > Runtime Code from the Applications menu.
Generated runtime code includes the private instance method named abtBuildInternals, which contains all of the information needed to recreate the visual subparts and connections of your part at runtime, as you defined them in the Composition Editor. It also includes the private class methods beginning with IS_ (short for interface specification), which contain all information needed to re-create the features of your part at runtime, as you defined them in the Public Interface Editor.