Open vi reference by string in executable

Hi all,
Scenario: A top-most vi (main.vi) calls two subvis (subvi1.vi and subvi2.vi) separately such that they run in parallel. subvi1.vi has a front panel that appears when called, subvi2.vi does not.
subvi2.vi uses Open vi Reference to get a reference to subvi1.vi. It then uses this reference in a loop and continually polls the property FrontPanel.IsFrontmost to determine if the front panel of subvi1.vi is frontmost. When it is frontmost, it performs certain actions. When it isn't frontmost - it doesn't.
This all works great in the development environment, but as soon as I build this 'scenario' into an application I get the following error:
subvi2.vi is generating the reference to subvi1.vi using the string "subvi1.vi" as an input to the path terminal of the Open vi Reference function. Why does this cause problems in a built executable?
P.S. Clearly this scenario is actually a part of my much bigger project, hence I don't have any simple vi's to attach
Message Edited by Thoric on 04-27-2009 01:06 PM
Thoric (CLA, CLED, CTD and LabVIEW Champion)
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Attachments:
crash.jpg ‏28 KB

Thoric wrote:
Norbert B wrote:
Thoric,
it's disturbing that LV is crashing on your system due to this error. What version of LV do you use?
LV 8.6.1 at least (i don't know which version was the first one) creates the following error:
LabVIEW: Open VI Reference no longer matches VIs in memory by filename. A filename is no longer sufficient because the full name of a VI now includes any owning libraries.
This error occurs even in the developement system.
I asume that the crash itself is created by handling of invalid references.
hope this helps,
Norbert
Norbert,
I am using LV 8.6 (not 8.6.1). I am using strings to identify vis, not paths. I believe the error you are encountering only relates to using paths for referencing vis.
If your assumption is correct and my crash is due the handling of invalid references, then I need to generate a path to the vi, rather then using it's name. But generating a full (non-relative) path might be tricky? If within subvi2.vi I use the 'current vi's path' function and strip it to determine the executable path, then add subvi1.vi, should that get me the path to subvi1?
THis really depends on how you did your build. If VI1 ends up as dynamic file vs part of the app, the paths will be different. Easy enough to check. Look at where your exe is and figure out if VI1 is there in the support/dynamics. If not it is probably inside the exe to the path would then be "My.exe.VI1.vi".
But I am speculating thats the issue so try to get more info.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
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Attachments:
sequenzer.png ‏86 KB

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Attachments:
vi ref.png ‏3 KB

Hi All,
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Bob_Schor wrote:
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