Clusters
Array of clusters (networks) contained in the database (array of XNET Cluster I/O Name).
Show Invalid From Open?
Configures whether to show invalid objects from the database when opened (boolean). Invalid objects are typically frames or signals, but other objects can also be invalid (such as clusters or ECUs). Within a database file, it is possible for a frame or signal to use an invalid or unsupported configuration. For example, one signal may overlap with another signal in its frame, or a frame may require a protocol that is outside the scope of the CAN or FlexRay standard. When this property is false (default), NI-XNET filters out invalid objects when it opens the database. This means that only valid objects are shown using I/O controls or functions in the Database palette. Any of these frames or signals can be used to create an XNET session without error. When you set this property true, NI-XNET will show invalid frames/signals in addition to valid frames/signals. You distinguish valid from invalid by reading the frame or signal property Configuration Status. By evaluating the configuration status of frames or signals, you can potentially correct the problems prior to using the objects with an XNET session.

NI-XNET LabVIEW API Reference