LabVIEW应用程序（EXE）无法正确动态调用插件

LabVIEW应用程序（EXE）无法正确动态调用插件

正在构建一个应用程序并使用插件架构，以便可以动态调用将来创建的VI（插件）。应用程序在LabVIEW开发环境中可以正常运行，但不能作为可执行程序运行。

运行可执行文件时，将发生以下情况之一：

应用程序似乎什么也没做，好像从未调用过插件

收到错误1003，指示VI不可执行

收到一个对话框，要求查找“丢失”的子VI

解决方案

下面概述了几种可用于解决此问题的方法：

方法1：将子VI包含在与插件相同的目录中

将插件使用的子VI保存在与插件相同的位置。还可以将这些子VI包含在与插件位于同一目录中的文件夹中。这是有效的，因为可执行文件的默认VI搜索路径包括可执行文件及其子目录的路径。注意：必须包括VI的所有依赖项，包括子VI等。

方法2：将插件另存为LLB

通过选择文件»使用选项保存»应用程序分发，将的插件另存为LLB。这会自动将所有子VI（包括引用的VI）保存到一个LLB文件中。有关创建LLB的更多信息，请参阅如何创建自动包含所有子VI的LabVIEWVI库vi.lib

方法3：将插件创建为单个顶级VI，并将子VI另存为LLB

这是方法1和2的组合。首先像往常一样保存的顶级VI（即MyVI.vi）。然后按照方法2（即MyVI.llb）中指定的方式保存的VI。这实际上将创建一个子目录（MyVI.llb），其中包括必要的子VI。注意：LLB还包括的顶级VI的另一个副本（即MyVI.vi）。这不会造成任何伤害，但是可以通过转到“工具»编辑VI库”从llb中删除副本。

方法4：明确指定子VI的目录（即vi.lib目录）作为可执行文件的VI搜索路径的一部分

如果在包含插件子VI的机器上运行可执行文件，则可以指定子VI的目录（即）作为可执行文件的VI搜索路径的一部分。为此，请将以下行添加到可执行文件的ini文件中：有关更改可执行文件的VI搜索路径的更多信息，请参阅如何更改或设置LabVIEW可执行文件的VI搜索路径？vi.lib

viSearchPath="C:\Program Files\National Instruments\LabVIEW \vi.lib ; C:\AnotherDirectory ; etc."

方法5：构建源分发

为插件VI创建源分发，确保取消选中以下选项以包含插件的所有依赖项。

附加信息

当动态调用插件VI，但由于主级可执行文件无法找到插件的依赖项而无法运行时，可能会导致此行为。例如，如果的插件使用VI（例如简单错误处理程序VI），则需要以某种方式告诉顶级可执行文件如何找到这些VI。在LabVIEW开发环境中运行顶级应用程序时不会发生此行为，因为该目录被指定为VI搜索路径的一部分（在工具»选项»路径»VI搜索路径中），但默认情况下不包含在可执行文件中。vi.libvi.lib

IssueDetails

I ambuilding an application and using a plug-in architecture so I can dynamicallycall VIs (plug-ins) that I create in the future. My application works correctlyin the LabVIEW development environment, but not as an executable.

Whenrunning the executable one of the following occurs:

Myapplication seems to do nothing, as if the plug-in was never called

I receiveError 1003 indicating that the VI is not executable

I receivea dialog asking me to find the "missing" subVIs

Solution

There aseveral method outlined below that may be used to resolve this issue:

Method 1: Include the subVIs in the samedirectory as the plug-in

Save thesubVIs that your plug-in uses in the same location as the plug-in. You can alsoinclude these subVIs in a folder that is located in the same directory as theplug-in. This works because the default VI Search Path for an executableincludes the path of the executable and its sub-directories. Note: you mustinclude all of the VI's dependencies, including sub-subVIs, etc.

Method 2: Save your plug-in as an LLB

Save yourplug-in as an LLB by selecting File»Save with Options»Application Distribution.This automatically saves all of the subVIs (including referenced vi.lib VIs)into one LLB file. For more information on creating LLBs, see How Do I Create aLabVIEW VI Library that Automatically Includes All SubVIs?

Method 3: Create your plug-in as a singletop-level VI and save your subVIs as an LLB

This is acombination of Methods 1 & 2. First save your top-level VI as usual (i.e.MyVI.vi.). Then save your VI as specified in Method 2 (i.e. MyVI.llb). Thiswill in effect create a sub-directory (MyVI.llb), which includes the necessarysubVIs. Note: the llb also includes another copy of your top-level VI (i.e. MyVI.vi.).This does not hurt anything, but you can delete the copy from the llb by goingto Tools»Edit VI Library.

Method 4: Explicitly specify the directory ofyour subVIs (i.e. vi.lib directory) as part of the VI Search Path for yourexecutable

If you arerunning the executable on a machine which includes the plug-in's subVIs, youcan specify the directory of the subVIs (i.e. vi.lib) as part of the VI SearchPath for the executable. To do so, add the following line to the executable'sini file:

viSearchPath="C:\ProgramFiles\National Instruments\LabVIEW \vi.lib ; C:\AnotherDirectory ; etc."

For moreinformation on changing the VI Search Path of an executable, please referenceHow Can I Change or Set the VI Search Path for LabVIEW Executables?

Method 5: Build a Source Distribution

Create asource distribution for the Plug-in VI, make sure to uncheck the followingoptions to include all dependencies for the plug-in.

AdditionalInformation

Thisbehavior can be caused when a plug-in VI is called dynamically, but is unableto run because the main-level executable cannot locate the plug-in'sdependencies. For instance, if your plug-in uses vi.lib VIs (such as the SimpleError Handler VI) you will need to somehow tell the top-level executable how tofind these VIs. This behavior does not occur when running the top-levelapplication in the LabVIEW development environment because the vi.lib directoryis specified as part of the VI Search Path (in Tools»Options»Paths»VI SearchPath), but is not included by default in executables.

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