Error using symbol synchronizer

I am trying to correct the timing offset using the symbol sync but I am getting an error "Changing the size on input 1 is not allowed without first calling the release() method." my code is:

%% General system details

sampleRateHz = 1e6; samplesPerSymbol = 8;

frameSize = 2^10; numFrames = 200;

numSamples = numFrames*frameSize; % Samples to simulate

modulationOrder = 2; filterSymbolSpan = 4;

%% Visuals

cdPre = comm.ConstellationDiagram('ReferenceConstellation', [-1 1],...

'Name','Baseband');

cdPost = comm.ConstellationDiagram('ReferenceConstellation', [-1 1],...

'Name','Baseband with Timing Offset');

cdTiming = comm.ConstellationDiagram('ReferenceConstellation',[-1 1], ...

'SymbolsToDisplaySource', 'Property','Name','Timing Synchronized Signal');

cdPre.Position(1) = 50;

cdPost.Position(1) = cdPre.Position(1)+cdPre.Position(3)+10;% Place side by side

%% Impairments

snr = 15; timingOffset = samplesPerSymbol*0.01; % Samples

%% Generate symbols

data = randi([0 modulationOrder-1], numSamples*2, 1);

mod = comm.DBPSKModulator(); modulatedData = mod(data);

%% Add TX/RX Filters

TxFlt = comm.RaisedCosineTransmitFilter(...

'OutputSamplesPerSymbol', samplesPerSymbol,...

'FilterSpanInSymbols', filterSymbolSpan);

RxFlt = comm.RaisedCosineReceiveFilter(...

'InputSamplesPerSymbol', samplesPerSymbol,...

'FilterSpanInSymbols', filterSymbolSpan,...

'DecimationFactor', samplesPerSymbol);

RxFltRef = clone(RxFlt);

symbolSync = comm.SymbolSynchronizer(...

'SamplesPerSymbol',samplesPerSymbol, ...

'TimingErrorDetector','Gardner (non-data-aided)');

%% Add noise source

chan = comm.AWGNChannel('NoiseMethod','Signal to noise ratio (SNR)','SNR',snr, ...

'SignalPower',1,'RandomStream', 'mt19937ar with seed');

%% Add delay

varDelay = dsp.VariableFractionalDelay;

%% Model of error

% Add timing offset to baseband signal

filteredData = [];

for k=1:frameSize:(numSamples - frameSize)

timeIndex = (k:k+frameSize-1).';

% Filter signal

filteredTXData = TxFlt(modulatedData(timeIndex));

% Pass through channel

noisyData = chan(filteredTXData);

% Time delay signal

offsetData = varDelay(noisyData, k/frameSize*timingOffset);

% Filter signal

filteredData = RxFlt(offsetData);

filteredDataRef = RxFltRef(noisyData);

y = interp(filteredData,samplesPerSymbol);

release(symbolSync)

rxSync = symbolSync(filteredData);

% Visualize Error

cdPre(filteredDataRef);

cdPost(filteredData);

cdTiming(rxSync);

pause(0.1); %#ok<*UNRCH>

end