An error is shown in the server error log when attempting to use appliance linking after applying the 6.4 upgrade on an SSL enabled K1000:
[Fri Jul 24 10:03:15.783250 2015] [proxy_fcgi:error] [pid 1285:tid 34402880512] [client 192.168.1.2:41142] AH01071: Got error 'PHP message: PHP Fatal error: KLinkManager::UnsealData(): openssl_open failed in /kbox/kboxwww/include/KLinkManager.class.php on line 818\n'
The cause of this issue is unknown. KACE engineering is currently investigating the issue.
ESMP-2089 Appliance Linking Errors Observed in Logs after upgrading to 6.4 with SSL Enabled.
NOTE: This issue has been resolved in KACE SMA version 7.0, please upgrade to the latest version. To obtain assistance with the appropriate upgrade path, see this article. For any versions necessary which are not listed in the technical documents/guides or downloads, please contact technical support.