Please see as well: VBox 5.0.10 crash issues with our Hands-On-Lab   Yesterday and the day before I’ve exchanged several emails with Ana who downloaded our Hands-On-Lab from here: Hands On Lab Upgrade, Migrate, Consolidate to 12c after OOW15, encountering a SEGMENTATION FAULT when trying to start the database upgrade with catctl.pl: $ $ORACLE_HOME/perl/bin/perl catctl.pl catupgrd.sql Segmentation fault  Very strange thing …  The database is in upgrade mode (checked this in the alert.log) and there are no strange things mentioned anywhere. Plus hundreds of people have run and completed our lab so far. Tue Nov 10 20:39:47 2015 MMON started…