RTE de LV cannot open the project files that include references .lvlib in dependencies

I am writing a DLL LabVIEW to inspect the LabVIEW project files, and I noticed that if a project has a .lvlib reference in its dependencies, then the Run-Time Engine is contradictory on whether or not he can find the project file:

  • Project.Open returns error 7 (file not found)

  • Project.GetFileLVVersion is a success

Here are some excerpts from my code of G and C engaged in this behavior:

   int openStatus = StatusSuccess;

   char * projectVersion = createStringWithLength (VersionStringLength);


printf ("Analysis %s\n", pathchaine);

   OpenProject (pathchaine & openStatus, projectVersion, VersionStringLength);

   printf ("  project written in LabVIEW %s\n", projectVersion);


If (openStatus is StatusSuccess)

   {

      printf ("  Open the project file.") \n") ;

   }

   on the other

   {

      printf("Error: could not find Project file, or file was not a Project file (Error code %i).\n», openStatus);")

   }

However, when running in the development environment, the two methods are successful.

Is this a bug, and if so, is it fixed in 2014 of LabVIEW?

Here's how you can reproduce:

Prerequisites:

    1. LabVIEW 2013 SP1 32-bit

    2. ConEmu for a good console- https://code.google.com/p/conemu-maximus5/wiki/Downloads

    3. minGW for compilation of a program to use the LabVIEW - http://sourceforge.net/projects/mingw/files DLL

reference .lvlib to break dependencies Project.Open in LV RTE

    1. Open the attachment in a temporary directory (e.g. c:\xtra\temp)

    2. Open "OpenProject.lvproj" in LabVIEW.

    3. Build 'Open library project'.

    4. ConEmu with a bash command prompt, navigate to the temporary directory.

    5. Type make

$ make

patch the file "builds/platdefines.h.

GCC - std = c99 g OpenProject.c o OpenProject.exe - lOpenProject - Lbuilds

6. type "c:\xtra\temp\OpenProject.lvproj" OpenProject

OpenProject $ 'c:\xtra\temp\OpenProject.lvproj '.

Analysis c:\xtra\temp\OpenProject.lvproj

  Project written in LabVIEW 13.0

  Open the project file.

7. the opinion that both call nodes execute correctly.

8. type "c:\xtra\temp\OpenProjectWithLvlibDep.lvproj" OpenProject

OpenProject $ 'c:\xtra\temp\OpenProjectWithLvlibDep.lvproj '.

Analysis c:\xtra\temp\OpenProjectWithLvlibDep.lvproj

  Project written in LabVIEW 13.0

Error: Could not find the project file or file was not a project file (error code 7).

9. notice that the node version managed while the open failure.

10 type diff OpenProject.lvproj OpenProjectWithLvlibDep.lvproj

$ diff-u OpenProject.lvproj OpenProjectWithLvlibDep.lvproj

-OpenProject.lvproj  kills Nov  4 11:28:28 2014

+++ OpenProjectWithLvlibDep.lvproj      kills Nov  4 11:32:37 2014

@@-13,7 + 13.11 @.

       true

       fake

       

-      

+      

+          

+              

+          

+      

       

          

             true

Here's another way to trigger this behavior, which shows that LabVIEW occasionally Range the element dependencies:

    1. Open "OpenProject.lvproj" in LabVIEW.

  • Add to the project a new VI and place the constant path of file "Application Directory" his block diagram.

  • Select ""leader "Save All (this project)" and use the default name for the new VI.

  • Type 'c:\xtra\temp\OpenProject.lvproj' OpenProject

  • Notice that there is a mistake once again, as is expected.

  • Remove the "Application Directory" path of file constant

  • Select ""leader "Save All (this project)"

  • Type 'c:\xtra\temp\OpenProject.lvproj' OpenProject

  • Note that the problem has disappeared, as is expected.

  • Add the "Application Directory" path of file constant in the block diagram.

  • Select ""leader "Save All (this project)"

  • Type 'c:\xtra\temp\OpenProject.lvproj' OpenProject

  • Notice there is no problem, which is surprising, because that there should be a mistake because the dependencies item was not tidy.

  • Close the new VI and pull out of the project.

  • Select ""leader "Save All (this project)"

  • Open "OpenProject.lvproj" in a text editor.

  • Note that the dependencies item was put away.

  • Add VI back to the project.

  • Select ""leader "Save All (this project)"

  • Type 'c:\xtra\temp\OpenProject.lvproj' OpenProject

  • Notice that there is a mistake once again, as is expected.

    • NInjaneer_wow wrote:

    The same behavior occurs in LabVIEW RTE: a new project with a constant of the Application in an empty vi directory will return an error 7 - file not found, but still return the correct version of LabVIEW in which the project was created.

    I did experiment with workarounds for this problem, and I found a.

    When I used to get the path of LabVIEW libdir in the ini of the executable file, execution is able to load and inspect the project file.

    LIBDIR = 'C:\Program NIUninstaller Instruments\LabVIEW 2013'

    While it is expected that a stand-alone executable can be placed on a system that does not have the LabVIEW IDE, it is still surprising to me that the execution engine cannot find standard library of LabVIEW without some explicit guidance. What other factors contribute to this behavior?

    References:

    Tags: NI Software

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