Instance Crashed Because Of Various ORA-600  Errors While Running catrelod.sql after Downgrade.
(Doc ID 2410848.1)
Last updated on FEBRUARY 03, 2019
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 and later
Information in this document applies to any platform.
Instance crashed because of various ORA-600  errors while executing the script $ORACLE11g_HOME/rdbms/admin/catrelod.sql
Errors in file /opt/app/oracle/software/Oracle12C/diag/rdbms/racdb/racdb1/trace/racdb1_ora_28520.trc:
ORA-00600: internal error code, arguments: , , , , , , , , , , , 
XDB SGA reset to NULL
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