ARexx provides tracing and source-level debugging facilities. Tracing displays selected statements in a program as the program executes. When a clause is traced, its line number, source text, and related information are displayed on the console.
The internal interrupt system enables an ARexx program to detect certain synchronous or asynchronous events and to take special actions when they occur. Events such as a syntax error or an external halt request that would normally cause the program to exit can instead be trapped so that corrective actions can be taken.
