the code are correct but display fails

%clc; clear; close all;
% Nom du fichier avec l'enregistrement
filename = "07-59-39_2480000000Hz.wav";

% Fréquence de coupure pour le filtrage passe-bas
lowpassFreq = 0.6e6; % [Hz]

% Mode BLE et index de canal
bleParam.Mode = 'LE1M';
bleParam.ChannelIndex = 39;

% Coefficients du filtre GFSK
BT = 0.5;
span = 4;


% Longueur de la section à traiter (à adapter selon taille du fichier)
StartIndex = 1;
EndIndex = 10e5; % exemple, à ajuster
% Lecture du signal
[rawSig, fs] = audioread(filename);

Error using audioread>readaudio (line 161)
The filename specified was not found in the MATLAB path.

Error in audioread (line 154)
[y, Fs] = readaudio (filename, fileNameObj.RemoteFileName, range, datatype);

% Conversion en enveloppe complexe
signalComplex = complex(rawSig(:,1), rawSig(:,2));

% Décalage en fréquence (si besoin)
freqCenter = 2.48e9; % Hz, fréquence du canal
IF = 4; % décalage si besoin
t = (0:length(signalComplex)-1)' / fs;
signalShifted = signalComplex .* exp(-1j*2*pi*IF*t);

% Filtrage passe-bas
processed_signal = lowpass(signalShifted, lowpassFreq, fs);
% Paramètres selon le mode BLE
if strcmp(bleParam.Mode, 'LE1M')
    bleParam.BitRate = 1e6;
    bleParam.SamplesPerSymbol = fs / bleParam.BitRate;
    bleParam.PreambleLength = 8;
    bleParam.AccessAddressLength = 32;
    bleParam.CRCLength = 24;
end

% Longueur du PDU
bleParam.PDUMinLen = 2; % en octets
bleParam.PDUMaxLen = 39; % en octets



% Adresse d’accès standard
bleParam.AccessAddressHex = '0x8E89BED6';
bleParam.AccessAddressBin = hexToBinaryVector(bleParam.AccessAddressHex, 32);

% Génération du préambule
bleParam.Preamble = ble.internal.preambleGenerator(bleParam.AccessAddressBin);
preambleVec = bleParam.Preamble(:).';  % colonne -> ligne
accessAddrVec = bleParam.AccessAddressBin(:).';  % colonne -> ligne

% Paramètres de modulation
sps = round(bleParam.SamplesPerSymbol);  % échantillons par symbole

% Modulation du préambule + AA
bits = [preambleVec, accessAddrVec];
bleParam.RefSeq = gmskmod_custom(bits, BT, span, sps);

% Objets utiles

prbDet = comm.PreambleDetector('Preamble', bleParam.RefSeq);
agc = comm.AGC;
coarseFreqComp = comm.CoarseFrequencyCompensator;

pktCnt = 0; crcCnt = 0;

figure;
plot(abs(processed_signal));
title('Signal brut');
xlabel('Échantillons'); ylabel('Amplitude');

figure;
spectrogram(processed_signal(1:min(EndIndex,length(processed_signal))), 1024, 512, 1024, fs, 'centered');
title('Spectrogramme du signal');

displayFlag =true;
while length(processed_signal) > EndIndex
    rcvSig = processed_signal(StartIndex:EndIndex);
    
    % AGC + Compensation
    rcvAGC = agc(rcvSig);
    release(coarseFreqComp);
    rcvComp = coarseFreqComp(rcvAGC);
    
    % Détection du préambule
    [~, dtMt] = prbDet(rcvComp);
    [threshold, IndexMax] = max(dtMt);
    startIdx = IndexMax - length(bleParam.RefSeq);
    
    if startIdx < 1 || (startIdx + 2000 > length(rcvComp))
        break;
    end
    
    if ~isempty(IndexMax)
        figure;
        subplot(2,1,1); plot(abs(rcvComp)); title('Signal compensé'); hold on;
        plot(IndexMax, abs(rcvComp(IndexMax)), 'ro'); xline(startIdx, 'r--');
        subplot(2,1,2); plot(dtMt); title('Corrélation du préambule');
    else
        disp('Aucun préambule détecté');
        StartIndex = EndIndex + 1;
        EndIndex = StartIndex + 2000;
        continue;
    end
    
    % Extraire trame
    rcvFrame = rcvComp(startIdx : startIdx + 2000); % taille à adapter
    
    % Démodulation
    bits = gfskdemod_custom(rcvFrame, fs, bleParam.BitRate);
    
    figure;
    stem(bits(1:100)); title('100 premiers bits démodulés');
    
    
    % Déblanchiment
    dewhitenStateLen = 6;
    chBin = int2bit(bleParam.ChannelIndex, dewhitenStateLen)';
    initState = [1 chBin];
    dewhiten = bluetoothWhiten(InitialConditions=initState');
    dewhitenedBits = dewhiten(bits);
    release(dewhiten);
    
    nbits = floor(length(dewhitenedBits) / 8) * 8;
    dewhitenedBits = dewhitenedBits(1:nbits);
    
    % Vérification CRC et décodage PDU
    [status, cfgLLAdv] = bleLLAdvertisingChannelPDUDecode(dewhitenedBits);
    
    if strcmp(status, 'Success')
        crcCnt = crcCnt + 1;
        pktCnt = pktCnt + 1;
        
        fprintf("Type de PDU : %s\n", cfgLLAdv.PDUType);
        fprintf("Adresse publicitaire : %s\n", cfgLLAdv.AdvertiserAddress);
        
        payload = cfgLLAdv.Payload;
        if length(payload) > 6*8
            AdvertiserAddress = dec2hex(bit2int(payload(1:6*8), 48, 0), 12);
            payload_int = bit2int(payload(6*8+1:end), 8, 0);
            DataName_char = char(payload_int.');
            fprintf("Adresse dans le payload : %s\n", AdvertiserAddress);
            fprintf("Payload HEX : "); fprintf("%x", payload_int); fprintf("\n");
            fprintf("Payload ASCII : %s\n\n", DataName_char);
        end
    end
    
    StartIndex = EndIndex + 1;
    EndIndex = StartIndex + 2000;
end

fprintf("Type de PDU : %s\n", cfgLLAdv.PDUType);
fprintf("Adresse publicitaire : %s\n", cfgLLAdv.AdvertiserAddress);
fprintf("Adresse dans le payload : %s\n", AdvertiserAddress);
fprintf("Payload HEX : "); fprintf("%x", payload_int); fprintf("\n");
fprintf("Payload ASCII : %s\n\n", DataName_char);

[Rookie Programmer]

You likely need to add -> addpath(genpath('Path Name')), where 'Path Name' is the directory where"07-59-39_2480000000Hz.wav" is stored.