how to change Programmacticly VI from preallocate or clone to Non-Reentrant in labview and Vice Versa

[ncnteam]

HI ,

    I need to Change Programtically VI Properties of Exceution of Reentrancy Options(Non-reentrant,Shared Clone and Preallocted Clone).

Pls help me out

[GerdW]

Hi ncn,

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@ncnteam wrote:

I need to Change Programtically VI Properties of Exceution of Reentrancy Options(Non-reentrant,Shared Clone and Preallocted Clone).

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Can you describe the reasons why you need to change that setting "programmatically"?

(This setting requires the compiler to recompile your LabVIEW program!)

[ncnteam]

Hi GerdW,

I have a scenario where I have two loops(MHL), and the same Sub VI is called multiple times. I need to make some of them Shared Clone or Preallocated Clone, and others Non-reentrant, based on user selection through a GUI.

In my program, there are multiple Sub VIs, and based on their function, I need to make this decision dynamically.

My Plan:

1. Create a GUI that allows users(My fellow Developers) to:

   • Browse and select VIs.

   • Choose the desired Reentrancy Mode (Shared Clone, Preallocated Clone, or Non-reentrant).

2. Implement a feature to apply the changes programmatically based on the user selection.

Current Progress:

• I can already change reentrancy modes from Shared Clone to Preallocated Clone.

• However, I need help in changing the reentrancy mode to Non-reentrant programmatically. (I have attached the VI that I am currently working with.)

Request:

Could you please guide me on how to implement this functionality or if there is any better approach to achieve the same?

Thanks in advance!

[raphschru · Accepted solution]

Hi,

It depends whether this is for:

1. Modifying a VI in a running application:

In this case you simply can't because it requires LV to recompile your program, as @GerdW explained.

So make the VI always reentrant and create as many clones as needed dynamically (1 or more).

Also I don't think this would be a good idea to let a user (non-developer) to choose whether a VI should be reentrant or not.

2. Making a scripting tool for using when coding (target VI is in edit mode):

You can do that by using VI properties:

"Execution > Is Reentrant"

"Execution > Reentrancy Type":

Non-reentrant:

Reentrant with shared clones:

Reentrant with preallocated clones:

Also, you may want to save the VI afterwards to make the changes persistent:

Regards,

Raphaël.

[ncnteam]

Thanks Raphaël for solution.