To view 32-bit LV on Win7 64bit system, which LV version should be installed on the 64bit machine?

[Dennis_Knutson]

You must have clicked the 'Post' button before you completed the question since the message body is incomplete. Try again and explain what you are trying to view. Is it just a VI or an application that was built?

[markfe]

Suppose a LV application is developed for a 32-bit PC.

I want to view the vi's on a Windows 7 64-bit PC.

Should I install 32-bit or 64-bit LV 2009 on the 64-bit machine?  Does it make any difference which version is installed?

[Yamaeda]

I assume the title is the full question. For a VI you can use any version, right? It's just that a 64 bit LabVIEW compiles 64 bit code.

[Dennis_Knutson]

The VIs are the source code and can be opened with whatever development environment you have loaded.

[odessy27]

I am assuming you have LV2009 (32 bit). You can install 32 bit LV2009 on 64 bit windows PC and run all your VIs just fine. You don't have to install 64 bit LV on 64 bit machine to run/view the VIs. (although I am not sure how would a VI developed in LV 32bit behave in LV 64bit and vice versa) I hope that answers your question. 

[markfe]

So then I may as well install LV 2009 64-bit on the Windows 7 machine since it would be able to read (and locally run?) vi's developed anywhere else?

[markfe]

From the install readme file:

LabVIEW 2009 (64-bit)

LabVIEW 2009 introduces a 64-bit version of the LabVIEW Development System. When run on Windows Vista (64-bit version), LabVIEW 2009 (64-bit) provides access to more memory than either a 32-bit operating system or a 32-bit application can provide. LabVIEW 2009 (64-bit) includes nearly all of the development environment features of LabVIEW 2009 (32-bit), including the LabVIEW Application Builder.

Refer to the National Instruments Web site for information about obtaining a copy of LabVIEW 2009 (64-bit).

Supported Hardware

LabVIEW 2009 (64-bit) supports many hardware devices. Drivers are available for DAQ devices, VISA devices, GPIB devices, and image acquisition devices. For GPIB devices, you must use at least NI-488.2 2.6 for Windows. Refer to the specific hardware documentation for more information about compatibility with LabVIEW 2009 (64-bit).

Supported Modules

LabVIEW 2009 (64-bit) supports only the NI Vision Development Module. Refer to the Vision Development Module documentation for more information. LabVIEW 2009 (64-bit) does not support any additional add-ons.

So now I guess the safest thing to do from a compatibility viewpoint at this time is to install the 32-bit version on the Win 7 64-bit machine.

[REM1]

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Dennis Knutson wrote:
The VIs are the source code and can be opened with whatever development environment you have loaded.

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Dennis is correct.  You can view VIs written in 32-bit LabVIEW in 64-bit LabVIEW and vice-versa unless the VI in question uses some feature that is specific to a particular bitness level.