You have to cast your %CharacterStream to a specific implementation, say, to %GlobalCharacterStream. The latter one implements %GlobalStreamAdaptor, which inherits from %AbstractStream and %Stream.Object. Finally, the %Stream.Object class exposes the CopyFrom method which allows you to copy data from your %Stream.GlobalBinary instance (and vice versa)

Thanks, got it. Then perhaps this setting can somehow be changed programmatically, in the installer code?

Thanks a lot Robert. I completely forgot about multiple inheritance 😶