How to send an array of clusters to LabVIEW??

You might be able to send an Array of fixedCluster [String "Identifier", String "flated Cluster",Array[int]"Typeofelement"].
You may then reconstruct the received Flated Clusters by String2Variant(Typeofelement) -> Variant2Data(Identified Clustertype).
Offcourse you will need to know all possible Types of Clusters and give the Variant2Data the right Prototype-Cluster (you will need an IdentifierString-Case for this unless you use a "Variant-Attributes"-Case).
Sorry that this comes so late, but it might now help others...

;-)