What version of the NIvision.dll is on each machine, (the ones that work and the one that throws the error message)? You can check the version in MAX by expanding the Software tree, selecting IMAQ Vision, and then the main part of the screen will display the version, such as 7.0.1.187.
Also, do other VIs exhibit the same problem? For example, what happens when you load a LabVIEW Vision shipping example on the Windows 2000 system?
Best regards,
Dawna P.
Applications Engineer
National Instruments