The Message Stack pane lists the stack of methods that were executed leading up to the method where the execution was suspended.

Methods are shown using the system's format for methods: class>>#method. The # character precedes method names because method names are symbols in VA Smalltalk / VAST Platform. [] in characters at the beginning of an entry indicates that a block of code in the method was executed. The word class after a class name indicates that the method is a class method; methods not having the word class are instance methods.

The Message Stack pane shows the most recently sent message at the top of the list, and the first message sent at the bottom of the list. It includes messages sent by your code as well as messages sent by the system.