I am all of a sudden getting the message "Cannot closw waveform device for playback." How can reset the device or wait till the data is finished playing?
You say "all of a suddden" so that leads me to believe that what you are trying to do now, did work for you at one time very recently.
Did you, perhaps, change something that you felt would have no or a different effect on what you are trying to do ?
You need to go back, maybe eveen to a computer re=set point,and see if you can restore your program to an earlier state and then go from there. Good luck