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Oracle® Database 11g / 12c / 18c error codes NZE-29006: The certificate request message is invalid when using SSL 2.0.
NZE-29006: The certificate request message is invalid when using SSL 2.0.
Oracle Error Code: NZE-29006
Cause: There is an error processing the SSL 2.0 REQUEST-CERTIFICATE message.
Action: Enable Oracle Net tracing and attempt the connection again. Contact Oracle customer support with the trace output.