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EM 12c: Using Enterprise Manager 12c Cloud Control to Monitor 11g Databases with AES256 Encryption Generates TNS-12599 Errors in Target Alert Logs (Doc ID 1520496.1)

Last updated on JULY 13, 2020

Applies to:

Enterprise Manager for Oracle Database - Version to [Release 12.1]
Enterprise Manager Base Platform - Version to [Release 12.1]
Information in this document applies to any platform.


After installing EM12c and having it monitor 11g database targets with AES256 encryption, the following errors are shown in the alert logs:

NI cryptographic checksum mismatch error: 12599.

        TNS for Linux: Version - Production
        Oracle Bequeath NT Protocol Adapter for Linux: Version -
        TCP/IP NT Protocol Adapter for Linux: Version - Production
  Time: <Date time stamp>
  Tracing not turned on.
  Tns error struct:
    ns main err code: 12599

TNS-12599: TNS:cryptographic checksum mismatch
    ns secondary err code: 2526
    nt main err code: 0
    nt secondary err code: 0
    nt OS err code: 0


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