I found a bug with tdms get property (in LV 8.5) basically if the Property Value output isn't wired then the Found Output may not return true when it should. I've attached an example, just probe the found output, and it'll return false if property value isn't wired and true if it is (you can just attach it to the case structure). Oddly if I attach an indicator to found and wire Property Value, then run it, I can remove the property value wire, and it'll work until I open the vi again.
Matt W.