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Hi Guys Attached is a package that installs a palette in user.lib to expose the Variant Data Type API found in vi.lib\Utilities\VariantDataType. Enjoy -JG jgcode_fix_ni_variant_data_type-1.5-1.ogp [LabVIEW 8.2+]

Like Francois said, the downcast prim is based on wire type, not object type. Try using the Preserve Run Time Class prim to get the behavior you expect.

Hi Jon, You typecast from LVObject to LVObject, so I'd expect that you don't get an error for that with "To More Specific Class" prim. I suspect there would be a significant increase in overhead if this primitive were to dynamically check for the class hierarchy when it's fed with LVObject. It seems to me that this is like a using the code below: <a href="http://content.screencast.com/users/normandinf/folders/Jing/media/7a120e9c-2ed5-448a-973c-9971c69993b2/class%20typecast.png"><img'>http://content.screencast.com/users/normandinf/folders/Jing/media/7a120e9c-2ed5-448a-973c-9971c69993b2/class%20typecast.png"><img class="embeddedObject" src="http://content.screencast.com/users/normandinf/folders/Jing/media/7a120e9c-2ed5-448a-973c-9971c69993b2/class%20typecast.png" width="452" height="249" border="0" /></a> While the other case is clearly wrong as expected. In my opinion, this is not a bug in the behavior of the primitive but perhaps a bug in documentation?

The typo was on purpose to see if anyone would notice. It worked!

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