kfoldLoss not found for 2022a

I have tried for both 2020a and 2022a, but getting the same error:

Unrecognized function or variable 'kfoldLoss'.

%hyperparameter tuning for NN - https://uk.mathworks.com/matlabcentral/answers/428298-neural-network-hyperparameter-tuning

YTrain=classEns(resampleInd,:);

XTrain=train_prod_0(resampleInd,:);

% Define a train/validation split to use inside the objective function

cv = cvpartition(numel(YTrain), 'Holdout', 1/3);

% Define hyperparameters to optimize

vars = [optimizableVariable('hiddenLayerSize', [1,20], 'Type', 'integer');

optimizableVariable('lr', [1e-3 1], 'Transform', 'log')];

% Optimize

minfn = @(T)kfoldLoss(XTrain', YTrain', cv, T.hiddenLayerSize, T.lr);

results = bayesopt(minfn, vars,'IsObjectiveDeterministic', false,...

'AcquisitionFunctionName', 'expected-improvement-plus');

errors are shown below:

results = bayesopt(minfn, vars,'IsObjectiveDeterministic', false,...

'AcquisitionFunctionName', 'expected-improvement-plus');

Unrecognized function or variable 'kfoldLoss'.

Error in @(T)kfoldLoss(XTrain',YTrain',cv,T.hiddenLayerSize,T.lr)

Error in BayesianOptimization/callObjNormally (line 2552)

Objective = this.ObjectiveFcn(conditionalizeX(this, X));

Error in BayesianOptimization/callObjFcn (line 487)

= callObjNormally(this, X);

Error in BayesianOptimization/runSerial (line 1914)

ObjectiveFcnObjectiveEvaluationTime, ObjectiveNargout] = callObjFcn(this, this.XNext);

Error in BayesianOptimization/run (line 1856)

this = runSerial(this);

Error in BayesianOptimization (line 459)

this = run(this);

Error in bayesopt (line 323)

Results = BayesianOptimization(Options);

I need to use kfoldLoss but it is not found, please help!

[Tim Dong]

Resolved thanks. After putting function in another script it worked okay.