Steam versions (purchased Combined Operations)
ARMA II runs fine, but OA initially errors with "Addon 'CA_CommunityConfigurationProject_E' requires addon 'CA_AIR_E_MQ9PredatorB'", then tries to start up (loading screen briefly appears), and finally closes with "Bad serial number given in Setup"
I have tried:
Registry fixes (deleting ARMA II OA folders, adding Key value, giving all users full permissions to the Bohemia folders)
Running steam as admin
Verifying file integrity
Wiping out ARMA dirs in steam, redownloading (as admin)
I am submitting the crash report to you. Thanks for any help!