Get an errocode from ossl.c

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I try to connect a client via TLS. I us the keys and certs from Tibco sample. The server log shows:

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Peer certificate:

Certificate=[/C=US/ST=California/L=us-english/O=Test Company/OU=client Unit/CN=client/emailAddress=client@testcompany.com]

Sep 27 13:24:05 idatib1 tibemsd: Issuer=[/C=US/ST=California/L=us-english/O=Test Company/OU=client_root Unit/CN=client_root/emailAddress=client_root@testcompany.com]

SSL accepted cipher=ECDHE-RSA-AES256-GCM-SHA384

Connection protocol=TLSv1.2

[OpenSSL Error]: file=ossl.c, line=2188

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Can anybody tell me what's this error means?

Thanxs

Thomas