I'm using a USB-6251for testing a custom circuit. In creating my VI in LabView, I conttected a Vertical Pointer slide to a DAQ Assistant to generate an analog voltage. However I get an error: Error 200077 occurred at DAQmx Write, You have requetsed :1, Values begin with : 2. Can I not conect a slider directly to the DAQ Assistant or do I have to interface it with some thing first?