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Class conflict when programmatically editing graphs with property node

I am trying to programmatically move the cursors on a graph. I want the cursor to look the same on 2 different graphs so I made a subVI. The code works correctly when I have seperate property nodes, but when I try to use the subVI, I get a class conflict -

 

"You have connected a refnum of one type to a refnum of another type and both types are members of some class hierarchy, but there is neither a simple up cast nor type cast between the two classes."

 

I am not sure how to fix this. The graph that works is of a waveform, and the graph that doesn't is the output of the FFT Power Spectrum VI. Is the problem that the inputs are different? Or is there some kind of resource conflict when using property nodes in subVIs?

 

 

cursor error.png

 

 

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A shot in the dark here.  But maybe if you make the subVI's input reference of type GraphChart it would work.


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