SQL Optimizer for Oracle gets extracted into QuestSQLOptimizer_Oracle_741_815.msi file and is unable to launch SQL Optimizer for Oracle because of the following error message:
"Quest.Tuning.Oracle.Main has encountered a problem and needs to close. We are sorry for the inconvenience."
Running QuestSQLOptimizer_Oracle_Common.msi solves this error message.
QuestSQLOptimizer_Oracle_Common.msi file also gets created after extracting SQL Optimizer for Oracle.