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I am flattening an array of classes and loading into an MSSQL database in an XML column. When the XML is returned it is formatted to take up less space. Which means a line of "<Cluster></Cluster>" becomes "<Cluster/>". When returned in this manner I get an error: 1403 LabVIEW: Attempted to read flattened data of a LabVIEW class. The data is corrupt. LabVIEW could not interpret the data as any valid flattened LabVIEW class. Lines that have <Val/> and <Name/> work ok. It is only the custer tag that has the issue. I have attached two xml files...one with <Cluster/> (doesn't work) and the other with <Cluster></Cluster> (works) for reference. I am hoping someone at NI will take a look at this and enter a CAR if necessary because it just seems to be an overlooked item that doesn't happen much. This seems only possible with classes when a child class is empty. I don't think an empty cluster outside a class is possible. The work around is to perform a search and replace of <Cluster/> with <Cluster></Cluster>. Easy, but shouldn't be necessary. Using LabVIEW 2011. BeforeReplace.xml ClusterReplace.xml