Problem with FGEN Driver in VB

[William.Maier]

Hi,

I am trying to use a .dll driver I created with LabVIEW in VB.  However, when I try to debug a VB project using functions from the .dll, I get the error shown in the attached image.  The text reads "Could not load file or assembly 'NationalInstruments.LabVIEW.Interop, Version=1.0.0.0, Culture=neutral, PublicKeyToken=daeb5dc76be4e32a' or one of its dependencies. The system cannot find the file specified."

I should note that this computer does not actually have LabVIEW on it.  I am suspecting that may be related to the problem.

I am using Visual Studio 2008, version 9.0.30729.1 SP.  I am also using .NET version 3.5 SP1.  I am also using NI Measurement Studio 8.6.35.465

Let me know if there are any other important details I should provide related to this.

Thanks,

Billy

note:  This is a cross-post from the Measurement Studio forum.

[Dennis_Knutson]

Do you have the LabVIEW runtime installed?

It's also not clear off the type of dll you created. A c type or .net.

[William.Maier]

It is a .net Interop dll.  I'm fairly certain LabVIEW runtime is not installed.  Is there a way to verify this?

Thanks

[Dennis_Knutson]

Why don't you just install it?

[William.Maier]

The nature of this project requires that we can't install any new software on this machine.  The idea to use a LabVIEW-generated driver was conceived by someone who didn't have an exact knowledge of the machine itself and what NI software it already has.

If there is no LabVIEW runtime on the machine, is it still possible to use this dll?

Thanks

[Dennis_Knutson]

No.

[William.Maier]

Is there a way to wrap the driver such that it can be used?  Is the NI FGEN .net wrapper usable without LabVIEW Runtime?

Thanks

[Dennis_Knutson]

If you use LabVIEW, the runtime is required. Does NI not provide a .NET api?

[William.Maier]

Okay, so after running a search I have determined that the machine does in fact have LabVIEW runtime.

Given that, is there another possible cause for the error in my inital post?

Thanks

[Dennis_Knutson]

I don't have enough experience with .NET to suggest anything other than double checking the path as the error mentions, sorry.