In this messsage "Error in designfilt (line 189)," the "line 189" is refering to the line number in designfilt, not your code. Your code had an error on line 13 of test1.m, which is the location of the call to designfilt.
Running the first part of your code:
fs = 16e3;
numFilts = 32;
BW = 100; %Filter Bandwidth
filter_number = 30;
%range = [50 8000];
CenterFreqs = linspace(50, 8000, numFilts);
CF1 = CenterFreqs - BW/2; %Lower cutoff frequency
CF2 = CenterFreqs + BW/2; %Upper cutoff frequency
Check the endpoints of CF1 and CF2
CF1(1)
CF2(end)
Now look at the error message:
"Frequency specifications must be between 0 and 8000."
I'm not sure if CF1(1) = 0 is considered to be "between 0 and 8000" but CF2(end) = 8050 is outside the allowable range in the error message.
