Waring subVI expected to be at A was loaded from B

Question

Hi,
A well known drawback of before version LabView is that, it doesn't organize files in terms of project. It has been discussed many where. Here I still want to ask a specific problem arising from it. Provided folder A contains folder B, a VI noted as VI1 is in B, and I creat a new folder C in B, and I move VI1 from B into C. VI1 calls VI2 in B.
After VI1 is moved into new folder, I open it. There are many warnings like below:
subVI expected to be at A\B\C\VI2 was loaded from A\B\VI2.
I can understand it. I guess LabView remembers relative path. VI2 is supposed to be in the same folder as VI1 is.
But I can get other warnings like below:
subVI expected to be at A\B\D\VI3 was loaded from A\B\VI3.
I can't understand it. A\B\D is even not a real existed path. It looks like LabView imagines it. D is a existed folder. But it is not under A. So I don't know why LabView "EXPECT" such a imaginary path?

Answer 1

Like you guessed, LabVIEW stores relative paths. If a VI cannot locate it's sub-vis in the location they expected, it will start to search. The search order is given in the LabVIEW options dialog, but basically first the search is done below any folder of the current VI, then in the LabVIEW data folder, then user.lib and vi.lib.
You can however add your own folders or order to this search.
As you have seen the Expected path can be non-existent, here's an example
VIA cals VIB located in c:\test
VI      Path
VIA    c:\VIA.vi
VIB    c:\test\VIB.vi
Now you decide to move both VIs to the same folder called 'production'
VI      Path
VIA    c:\production\VIA.vi
VIB   
c:\production\VIB.vi
If you open VIA it will expect VIB to be at c:\production\test\VIB.vi, but it cannot be located and starts to search, since both VIs are in the same folder this search is done rather quick (and you might not even see the search dialog) and LabVIEW shows the warning dialog.
Ton
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