convolution, unrecognized function ir variable 'UP'

i don't know how to fix this error occured, separte noise from signal

[Walter Roberson]

We do not have your input file.

[Sherif Aly]

https://we.tl/t-2SG1dHfAO4

above the input file since i can't upload it here

Answer 1

[Walter Roberson]

UP = BandPass;

Insert that line before the line where the error is occuring.