This documentation is organized under the following headings:

Natural Nucleus Generated Messages
	Natural System Error Messages	Explains the system error messages that may be issued by the Natural nucleus. Library-specific messages and messages relating to other Software AG products are not included.
	GETMAIN Error Numbers in NAT7545	Contains the error numbers which are displayed in Error Message NAT7545 as a result of a failed GETMAIN request.
	FREEMAIN Error Numbers in NAT7546	Contains the error numbers which are displayed in Error Message NAT7546 as a result of a failed FREEMAIN request.
	Compression/Decompression Error Messages	Contains the error messages (NUS02nn) that may be issued by the Natural thread compression/decompression routine as a result of user session errors.
Natural Buffer Pool Messages
	Natural Global Buffer Pool Manager Messages	Contains the informational and error messages issued by the Natural Global buffer pool manager under z/OS.
	Message Buffer Pool Messages	Contains the messages that may be issued by the Message Buffer Pool.
Roll Server, ASM and SIP Messages and Codes
	Roll Server Messages	Contains the messages that may be issued by the Natural Roll Server. *
	Return Codes and Reason Codes of the Roll Server Requests	Contains the return codes and reason codes of the roll server requests. *
	Authorized Services Manager Messages	Contains the messages that may be issued by the Natural Authorized Services Manager. *
	SIP Service Return Codes and Reason Codes	Contains the return codes and reason codes of the Session Information Pool Service requests. *
Server-Specific Messages and Codes
	RPC Server Front-End Messages	Explains the messages that may be issued by the RPC server front-end. *
TP Monitor Interfaces Messages and Codes
	Natural under Com-plete/SMARTS User Abend Codes	Contains the abend codes issued by the Natural Com-plete/SMARTS Interface. *
	Natural under CICS Messages	Contains the abend codes, SCP environment initialization errors, SCP environment recovery errors, SCP processing errors and the session errors issued by the Natural CICS Interface. *
	Natural under IMS TM Error Messages	Contains the error codes and messages that may be issued by the Natural IMS TM Interface. *
Database Management System Interfaces Messages and Codes
	Static Generation Messages and Codes Issued under NDB	Contains the error messages that may be issued during static generation under Natural for Db2.
	Messages from the Shared Memory Objects File Server under NDB	Contains the messages that may be issued by Shared Memory Objects File Servers under Natural for Db2. *
	Reason Codes for the Shared Memory Objects File Server under NDB	Contains the reason codes that can be appear for Shared Memory Objects File Server requests under Natural for Db2. *
	Natural for DL/I Interface Status Codes and Abend Codes	Contains information on status codes and explains the abend codes that are used under CICS only. *
	Natural for VSAM Interface Abend Codes	Explains the abend codes that may be issued by Natural for VSAM. *
Add-On Product/Component Messages and Codes
	Debug Attach Server	Explains the errors messages that may be issued by the debug attach server.

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).