Hi student G,
I've seen cases where this issue, is due to a memory problem. What we can do, is do some test to if can do a program, without the error using the FFT.vi. Generate the samples, with a number of samples 2^n (64, 128,256, etc), the FFT is faster in these conditions.
Lets do a simpler program without the while loop and the event structure, to see if the error is in FFT.
Tell me how it goes.
Tania Lozoya
NI MEXICO