labview child class data access

[Velpula]

Hi All:

I Have Parent class and Master as Child class ...

I am having a problem here getting data from Create method..I can see the data at the end of the create method (shown below); but at the top where I show indicaters it is not reflected... can someone pt me where I am making a mistake...

COM and slave data are defined both in the parent and child class...

See attached

Thanks

Leela.

[GregFreeman]

There is nothing attached.

[Velpula]

here it is

[Velpula]

[RavensFan]

Can you attach the image as an attachment?

That image is too small to see.

[Velpula]

[MarcoMauri]

I'm afraid in the child VI you are accessing the WRONG data members.

In a child class VI vi in order to access parent private data you have to use Data Member Access VIs.

Regards,

Marco

[MarcoMauri]

I forgot,

my assumption is based on your sentence:

"COM and slave data are defined both in the parent and child class..."

Why do you need to place them in both places?

Marco

[Eric.M]

Hi,

The wild unbundle in the top VI will return private data from the Master class, while you had actually set the private data of the Parent class using inheritance in the first subVI, so your behavior is expected. Like Marco said, it's very messy to have the same private data in both parent and child class 😕

Regards,

[Velpula]

I AM very new to OOP;

that is what I was initially thinking that in the master class I don't need to define the COM and Addr as they were already defined in the Parent Class as Data...Later I was having some problem so I added them....

Could you please shed some light on Dynamic Dispatching and Data Member Access VIs, when or Where  (under Child or Parent Class ) do we use them...

Leela.