VI Call Type Confusion: Class Member Call vs VI Call

[EricEvola]

What is the difference between specifying that a VI is a method member as opposed to just specifying that it is a VI Call from the Call Type drop down menu? I have looked at the documentation, but it seems a bit sparse.

Bonus: Is there something about classes that prevents their member VIs from doing the Step Into to debug their block diagrams? When I step into these VIs, they just skip right over the VIs.

[Kurt-P · Accepted solution]

Hey Eric, 

The main difference is that you don't get dynamic dispatch when you call through the VI Call option. As for your bonus question, I am not sure why that wouldn't work. I tried this with a static member and was able to step into it and see the block diagram just fine. Was the VI part of a inheritance chain? Was it a dynamic dispatch VI? Did you get an error? Can you step into any VI? 

I am not sure if you saw these, but I want them here for reference:

Calling LabVIEW Class Member VIs from TestStand

and 

Passing an Instance of a LabVIEW Class Object

Was this the documentation you were referencing? If so, what is missing?