Hi kmagas,
The Ramp function is part of the Advanced Analysis Library which is part of the LabWindows/CVI Full Development System package. My guess is that in CVI 7.1 you had the Full Development System and now in CVI 8 you just have the Base package. Thus you don't have the Ramp function. I would contact your local sales representative to see if you got the wrong package or what.
Best Regards,
Jonathan N.
National Instruments