.net constructor node error 3

[zou]

I removed System.Windows, and System Windows.Forms.

And rebuilt.  It looks like I am compiling with .NET 2.0:

------ Rebuild All started: Project: Animated GIF, Configuration: Release Any CPU ------
C:\Windows\Microsoft.NET\Framework\v2.0.50727\Csc.exe /noconfig /nowarn:1701,1702 /errorreport:prompt /warn:4 /define:TRACE /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Data.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Drawing.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Windows.Forms.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Xml.dll /debug:pdbonly /optimize+ /out:"obj\Release\Animated GIF.dll" /target:library Properties\Settings.Designer.cs Read.cs Properties\AssemblyInfo.cs

Compile complete -- 0 errors, 0 warnings
Animated GIF -> C:\George\C#\Animated GIF\Animated GIF\bin\Release\Animated GIF.dll
========== Rebuild All: 1 succeeded, 0 failed, 0 skipped ==========

When I link the .NET constructor to my dll, I still get the popup dialog telling me that lated version is selected.

And I'm still get error 3.

How do you provide an explicit constructor?

[smercurio_fc]

Using the sample code in your first post you would just need to do this:

namespace test
{
    public class Read
    {

        public Read()

        {

        }
 

        public int Load(String path)
        {
            return 0;
        }

    }

}

 

To be honest, I doubt this will make any difference, but who knows. 

[zou]

I added:

        public Read()

        {

        }

and rebuilt.  It seems no difference.

[smercurio_fc]

Then I'd say it's a problem with using .NET 3.x with LabVIEW.

[zou · Accepted solution]

Problem solved.

In my previous post, you can see the path for the C# project:

C:\George\C#\Animated GIF\Animated GIF\bin\Release\Animated GIF.dll

The problem was the path:

C:\George\C#\Animated GIF\Animated GIF\bin\Release\Animated GIF.dll

LabVIEW doesn't like C# in the path at runtime. although it's ok in edit mode.

In the edit mode, LabVIEW still can find all the methods and properties.

[smercurio_fc]

That seems quite strange. I thought you said you had also tried it with 8.2 and did not get an error. I assume you were doing the same thing in 8.2 that you were with 8.5.1/8.6?

[zou]

I tested on another pc which has LabVIEW 8.2 installed.  I copied the dll into the C:\temp directory.

Thanks for helping me ruled out all other possibilities.

Message Edited by zou on 09-15-2008 01:55 PM

[HJPhilippi]

 ...then he silently added, "When using .NET assemblies in LabVIEW, beware of critical characters in path names!"
And I said, "Huh...?!?"

Yep, this solved my problem, too, since I had the same .NET error and a similar path with a folder named C#.

1000 thanks for pointing me into this long forgotten direction (again)!

I don't know, what the hell NI is doing in its .NET development team, but since we decided to marry LabVIEW with a .NET sub/infrastructure 3 years ago, I surely grew older 30 years for all the recurring problems and errors LV has generated in this area...

😞

Cheers,

Hans

[KJSetter]

Excellent !!  Thank you so much. Same problem here C:\TheDump\c#Lib\ChartingAndPDF