Letswave FFT Filtering Error

Hello, I hope my message finds you well. I was trying to preprocess some data using the FFT Filter of Letswave 5. I keep getting these errors. I am no expert. I cant figure out what is wrong or how to fix it. Can anybody help?

Answer 1

[Swathik Kurella Janardhan]

You need 'Signal Processing Toolbox' to be able to use 'hanning' function. This function is not available in base MATLAB.

You can purchase this toolbox from MathWorks store.