Hi OD,
I presume this is the same computer that you developed it on? If not, I presume you have the LabVIEW run-time installed for the version you've built in?
Can you open and save the VI where you use the Basic Function Generator? Or mass compile your VIs in the project before building? Perhaps there is an older version of the Basic Function Generator in there not in the Run-time you're using.
Jeff | LabVIEW Software Engineer