Installing 12.1.0.2 database and cannot select Enterprise Edition

So your Oracle Installer it has come to select the Edition and ENTERPRISE EDITION is greyed of grayed out !!!  you can only select SE2 .

Heavens to Betsy

WHAT HAVE YOU DONE WRONG

WELL Just like the rest of us you have unzipped all the patchsets into a single directory.

But with this release Oracle have made SE2 different so Enterprise Edition is disks1 and 2 and SE2 is disks 3 and 4

So when you unzipped disks 1...10  SE2 has overwritten the database directory.

How to fix ?  Remove the unzipped database directory and just unzip disks1 and 2 for EE, and disk3 and 4 for SE2

HTH

Chris.