Cannot write via command Ref to class VI

LV2013 SP1, Win7

I'm an old LabVIEW and OOP in other languages, but fairly new to LVOOP.

This code worked fine until I put the part of the user interface in a CLASS.

I'm trying to read a file (PDM) and complete a series of controls WITHOUT KNOWING THEIR DATA TYPES.

Simply pass an array of the refs control to a VI and tell more later to save to a file.  The VI built the control label TDMS property names and gets their values as variants, able to write to a file.

During playback, the names in the file are matched to control labels and controls MUST BE filled.

As I said, it worked fine until I put it in a CLASS.

Here's the user interface in question - there are four controls that I wish to backup/restore.

It is a category.

I collect four references and to a method of CLASS PARENT

Here is the method of the PARENT class - it's simply the arbiters of control to a method without class, who remembers them via a id 'signature'

Here is the part READING this property Storage Manager.

All the properties of the file have been read in the tables.  Here we corresponds to a given control name with the name of the file and set the value of control once we find a matching name.

But it does not work.  The value of the control is not changed.

Here is an extract from log debugging:

I KNOW that the Ref of the order is correct, because the NAME who has logged from the REF CONTROL itself.  The names are not stored.

The VALUE in the debug log from the file.

There is no error reported.

But just what is the control on the Panel is NOT affected.

The setting of the green label text color is just an attempt to debug - it does NOT affect the control either.

Is there some kind of security "Shield" which prevents me from writing to a control inside a class?

Looks like which should cause an error, as appropriate.

Yet once, it worked very well until the classes participated...

Something else I'm missing?

I guess I can:

1... open a separate reference (and then close) just to get the size of the screen.

2... spend a REF for the SECONDARY in the class, and have the method of the user interface fit into the secondary.

Tags: NI Software

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