This error occured during deployment? Which is the LabVIEW adapter version that you are trying to use, is it the 9.0.1? Do you have other LabVIEW or TestStand versions installed in your computer? This error only occured when you try to used the class IviFgen, or even just with a simple VI?
What is the result of the error cluster from LabVIEW?
Also, can you post a simple exemple to reproduce this issue?