Private data control of this class is not a valid data type

The private data control must be a cluster of zero or more valid elements.

To correct this error, verify that the cluster contains valid elements. Click the Invalid Control button to open the Error list window and correct the errors the Error list window displays. The private data control might contain an array without a subtype, a nested cluster of zero elements, a missing or broken type definition, or a missing or broken LabVIEW class.