Please ignore my last email . I rebuild kamailio and those errors are gone. On Thursday, November 14, 2019, 04:46:58 PM PST, Rupesh Kumar &lt;rupesh_kumar(a)sbcglobal.net&gt; wrote: I am trying to compile and load kamailio 5.2.4 on centos 7.5. I am getting  below errors whenever I start kamailio . I have the latest openssl and openssl-devel packages installed on my centos . Not sure what other dependencies .   Not starting Kamailio SIP Server: invalid configuration fil[FAILED]                                                           [FAILED]0(23235) ERROR: <core> [core/sr_module.c:498]: load_module(): could not open module </usr/local/lib64/kamailio/modules/db_mysql.so>: /usr/local/lib64/kamailio/modules/db_mysql.so: undefined symbol: SSL_get_error 0(23235) CRITICAL: <core> [core/cfg.y:3508]: yyerror_at(): parse error in config file //usr/local/etc/kamailio/kamailio.cfg, line 229, column 12-24: failed to load module ERROR: bad config file (1 errors) 0(23235) INFO: <core[FAILED]sctp_core.c:53]: sctp_core_destroy(): SCTP API not initialized                                                           [FAILED] _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users