System Wide Error Codes Overview

Provides a core set of error codes that may be returned by System APIs.

These error codes are used by System APIs to indicate common mathematical, file, communications, and client/server errors. The errors may also be returned by non-System APIs where appropriate. APIs may also use additional error codes where the core set is not sufficient.

Error codes are returned to clients in three circumstances:

• as a simple TInt return value from a synchronous function

• as a leave code from a leaving function, which can be caught in a trap harness

• in a request status, when an asynchronous request function completes

Asynchronous Services Overview

Cleanup Support Overview