Hi Peter,
I think there's a bit of confusion here. The SPC toolkit is for LabVIEW or LabWindows/CVI. You can use it in either of these programming languages to create an operator interface for TestStand though to get the functionality built into a test executive.
I think (from what you've said) that you have an old version of the SPC toolkit which was originally compiled under LabVIEW 3.0.1. (version 1.0 of the SPC toolkit) - http://www.ni.com/support/labview/lvtool.htm#enterprise
If I'm right, you have two options.
1) Contact your local National Instruments branch and order the FREE updater so you can convert the .vi's from version 3.0.1 to version 4 compatible. From here you can use your copy of LV 6.0.2 to do the mass compile or just load them directly. (think
this is menu item -> Tools ->Advanced->Mass compile).
I'm not sure what issues might surround this though.Check out the following page
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/6f80a168949d5799862569310076f14b?OpenDocument
It says
You can load LabVIEW 4.x and later VIs directly into LabVIEW 6.x. To load a VI from LabVIEW 3.x or earlier, you must use a LabVIEW VI Conversion Kit, which is available for free from National Instruments. The part number of this kit for Windows and Macintosh is 776874-032) The SPC toolkit is now part of the Enterprise connectivity toolkit. You can get this from the www.ni.com (purchase online) or from your local NI branch. It should be compatible with your version of LabVIEW as the .vi's are built in 5.0 (revision C)
Hope that helps
Sacha.
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