In group mode, Installation Manager changes the umask value for the user to 002 when the umask value is 0n0 and n is an octal value. The umask value is set only for the current session of Installation Manager and does not persist after the user exits Installation Manager. The umask values are logged in the log file. Files that are created by Installation Manager have group write permissions by default. When Installation Manager starts, the effective group ID associated with the Installation Manager process must be the same group ID used to start Installation Manager previously. If the group IDs do not match, the user cannot start Installation Manager.