When the AVM executes the STOP statement it creates an instance of the Progress.Lang.Stop class. You cannot inherit from this class, and the class constructors are reserved for system use only. It contains one property as shown in the table below.

Table 1. Progress.Lang.Stop properties
Member Description
CallStack property Returns a string representing the call stack at the time the stop object is created. Because this is for a STOP condition, this property is always populated. The ERROR-STACK-TRACE attribute of the SESSION handle does not have to be TRUE.