Programmatically find out callers

[Rashek]

Hi all,

I would like to ask, whether it is possible to programmatically find out callers of certain VI in project, just like Find - Callers in project tree does.

[GerdW]

Hi Rashek,

have you tried to read the CallChain?

[paul.r]

I believe Rashek is looking for all of the callers of the VI, not the call chain.

Try the 'Callers' property node. Wire the VI reference to a property node and there are two properties - 'Callers Names' and a 'Callers Paths' that should get you what you are looking for, if I understood correctly. 

Edit - the 'Callers Paths' is a private property, however you should be able to use the 'Callers Names' property without any additional work. 

[wiebe@CARYA]

The callers of a VI only gives callers in memory, while the callers in the project returns all callers I the project, including VIs that are not in memory. You'd need scripting on the project to get that information.

[Rashek]

Exactly, that´s what I am looking for - scripting function which would allow me to find all callers inside project. I thought that maybe getting project reference and using some property/method from there... however, as far as I know there is no way to get project reference from a VI, so I am looking for an alternative solution.

[Intaris]

Well, you can start by getting the project which owns the VI.

This code illustrates the difference between "OwningProject" and "ActiveProject".  If you have more than one project open, selecting one project window over another will alter the value of "ActiveProject*" but "OwningProject" will remain the same (assuming you add the running VI to one of the projects).

Never mind the terrible reference handling..... just a 1 minute illustration VI.

[Rashek]

I already tried this, the problem I have with this approach is that if VI is part of library, you get only reference to given library. What I would like to do, is to get reference to the entire project, so that I can find callers even outside library

[Intaris]

Are you sure the VI Property "OwningApp" gives back a library reference?

The type of the VI Server reference is of type "Application", which seems seriously incompatible with giving back a Library reference......

Edit: I just tried putting the VI in a Library, still worked fine.  I got back a reference to the owning project.

Edit 2: Do you have the VI in a PPL by any chance? No idea how that would affect things.

[wiebe@CARYA]

[Intaris]

Hmmm, project Item from Ref. I need to re-activate the supersecret INI setting.....