The debugger is used to detect, locate and correct program errors, test or optimize program execution, or analyze a Natural error that interrupts program execution.

The Debugger documentation is organized under the following headings:

Tutorial	First steps with the debugger.
Concepts of the Debugger	Basic concepts of the debugger.
Start the Debugger	Operational requirements and instructions for invoking the debugger.
Switch Test Mode On and Off	Setting the test mode to activate and deactivate debugging.
Debug Environment Maintenance	Saving and using a predefined debug environment.
Spy Maintenance	Setting, modifying, deleting and activating both breakpoints and watchpoints.
Breakpoint Maintenance	Setting, modifying, deleting and activating breakpoints. Explanations of breakpoint screen contents.
Watchpoint Maintenance	Setting, modifying, deleting and activating watchpoints. Explanations of watchpoint screen contents.
Call Statistics Maintenance	Obtaining statistics about invoked objects.
Statement Execution Statistics Maintenance	Obtaining statistics about executed statement lines.
Variable Maintenance	Displaying and modifying variables.
List Object Source	Displaying an object source.
Error Handling	Handling errors that can occur during application or debugger execution.
Execution Control Commands	Debugger commands for program flow control.
Navigation and Information Commands	Debugger commands for screen navigation, object information and debugger profile settings.
Command Summary and Syntax	All debugger commands and appropriate command syntax.
Preparing Natural for Attached Debugging	Using a debug attach server running under NaturalONE.

Notation vrs or vr

When used in this document, the notation vrs or vr represents the relevant product version (see also Version in the Glossary).