Bug？？

[The_VI_Analyser]

Hi,

Are you changing the inheritance using the G# IDE or are you changing it using the LabVIEW tools?

You should be doing everything through the IDE (right click > g# IDE) this includes making you classes.

Depending on what you want to do, you may also need to define your class as 'abstract' when creating it.

[yanzhanglin]

All my operation Using G#IDE

[thols]

This is the change-inheritance bug in LV2020 I explained in https://forums.ni.com/t5/G/Inheritance-Error/td-p/4086662

The solution is in that thread.

[yanzhanglin]

it seems that not this bug。

[thols]

"

1. create queue_class Inherit  from G#

2.create UI_class Inherit  from G#

3. change UI_class  Inherit  to queue_class 

4.create a test vi, this vi content is create a UI_class  ,then call dequeue method  it occur errors ."

I did exactly that and the inheritance error is the only error I get. Please post code that can produce the error you are seeing. The code you posted throws an error but for a completely different reason than what you are explaining, and the reason for that error is already explained and has nothing to do with G#. Is that the error you are referring to? Are you getting a dialog from the LabVIEW IDE or an error code on the error wire? What error code is it?

[yanzhanglin]

1. create queue_class Inherit  from G#

2.create UI_class Inherit  from G#

3. change UI_class  Inherit  to queue_class 

  Until the third step, Does UI_create VI include Queue_Create Vi?

[thols · Accepted solution]

---

@yanzhanglin wrote:

1. create queue_class Inherit  from G#

2.create UI_class Inherit  from G#

3. change UI_class  Inherit  to queue_class 

  Until the third step, Does UI_create VI include Queue_Create Vi?

---

Ah, I see what you mean now. When changing inheritance from G#Object, the Create-method of the base-class is not inserted. It has likely been like this since forever and no-one was bothered enough by it to report it.

The workaround is to insert it yourself, as you have found out.

I have added this issue to the issue-list for G# and have talked to the main developer about it and hopefully it will be implemented in the next version of G#.

[yanzhanglin]

I think deep clone method 

and when we create property，we can create all property at one time，

and if we change objectAttribute members，we can just update property，it will change all create property VI。