Augerspecto,
I am assuming that you are referring to the Measure Buffered Period.vi example included with LabVIEW. If the example is not finding the counter VIs when it is loading you probably need to check your NI-DAQ installation. Ensure that you have NI-DAQ installed and if you don't, you need to download it and install it for those VIs to be available (http://digital.ni.com/softlib.nsf/MainPage?ReadForm&node=132010_US). If you already have NI-DAQ installed then check to see if you have the VIs on your Functions Palette (Functions > NI Measurements > Data Acquisition > Counter). If you don't have the VIs on your palette then reinstall NI-DAQ and ensure that you install support for your version of LabVIEW.
Ames
Applications Engineering
National Instrumen
ts