Hypertext: Object Class - Class to which a document belongs.
Here, you can change the message category between no message, error or warning. However, sometimes these categories are changed internally within the QS. If this is the case, the relevant long text help will contain documentation about which message class is used instead.
The system uses the parameter ID "MSV" to get a user-specific version of all messages, not only O1-messages. In this case, all O1 messages must be copied into a different version. If the different version does not contain a specific message category, the system defaults the setting "W".