RS,
We haven't got any previous experience having this error in this example. Could you specify the version of LabVIEW that you are using and also the exact example and from where did you get it (shipped with LV or downloaded from web), it may be faster if you attach it to this discussion please.
Error 1 description is:" Warning 1 occurred at an unidentified location. Possible reasons: LabVIEW: An input parameter is invalid."
So check your parameters first please. But it will be good if you could attach it here so we can see exactly which VI is. Just place an answer to your question and attach the VI and the info I asked, and I'll be notified promptly to take a look to this.
Good luck!...
Nestor Sanchez
Applications Engineer
National Instruments
Nestor