You can determine the meanings of your database error codes by referring to the database documentation.
You can see run-time system errors by using the FILE_TRACE ACUFH configuration variable with the Consolidated Tracing Facility (CTF).
Unless noted otherwise, this method applies to all RDBMSs supported by the family of interfaces. For a listing of run-time system errors, refer to the Troubleshooting section of the appendix that pertains to your product.