Can anyone please help? I'm all out of ideas. We were recently require to update our PC from Windows 98 to 2000 and ever since the upgrade, the data acquisition VIs that LabVIEW provides do not work. The problem occurs in multiple subVIs in the AI Buffer Read.vi. The specific error that I'm seeing is: "Call Library Function: function not found in library" When I pop up on the node, the dll and the function name both appear to be correct. Thanks for your time.