Problem with RCNN Detector

Hi Guys

I have a problem with RCNN detector as i am trying to train the detector for smoke images which is basiclly with layers Herein the code :-

any solution

Thank you in advance

load('gTruth.mat')
load('layers')
smokedetection = selectLabels(gTruth,'smokealarm');
 if isfolder(fullfile('TrainingData'))
    cd TrainingData
else
    mkdir TrainingData
end 
addpath('TrainingData');
trainingData = objectDetectorTrainingData(smokedetection,'SamplingFactor',4,...
'WriteLocation','TrainingData');
layers = [
    imageInputLayer([32 32 3],"Name","imageinput")
    convolution2dLayer([5 5],32,"Name","conv","BiasLearnRateFactor",2,"Padding",[2 2 2 2],"WeightsInitializer","narrow-normal")
    maxPooling2dLayer([3 3],"Name","maxpool","Stride",[2 2])
    reluLayer("Name","relu")
    convolution2dLayer([5 5],32,"Name","conv_1","BiasLearnRateFactor",2,"Padding",[2 2 2 2],"WeightsInitializer","narrow-normal")
    reluLayer("Name","relu_1")
    averagePooling2dLayer([3 3],"Name","avgpool","Stride",[2 2])
    convolution2dLayer([5 5],64,"Name","conv_2","BiasLearnRateFactor",2,"Padding",[2 2 2 2],"WeightsInitializer","narrow-normal")
    reluLayer("Name","relu_2")
    averagePooling2dLayer([3 3],"Name","avgpool_1","Stride",[2 2])
    fullyConnectedLayer(64,"Name","fc","BiasLearnRateFactor",2,"WeightsInitializer","narrow-normal")
    reluLayer("Name","relu_3")
    fullyConnectedLayer(2,"Name","fc_rcnn","BiasL2Factor",1,"BiasLearnRateFactor",10,"WeightLearnRateFactor",20,"WeightsInitializer","narrow-normal")
    softmaxLayer("Name","softmax")
    classificationLayer("Name","classoutput")];
options = trainingOptions('sgdm', ...
  'MiniBatchSize', 32, ...
  'InitialLearnRate', 1e-6, ...
  'MaxEpochs', 10);

imds=trainingData

detector = trainRCNNObjectDetector(trainingData, layers, options, 'NegativeOverlapRange', [0 0.3]);
save('Detector.mat','detector');

and the errors are :-

Error using trainNetwork (line 165)
The class names of layer 13 must match the class names of the training data. The training data class names are given by
categories(Y), where Y are the training data labels.

Error in rcnnObjectDetector.train (line 234)
            [net, info] = trainNetwork(dispatcher, layers, opts);

Error in trainRCNNObjectDetector (line 278)
[detector, ~, info] = rcnnObjectDetector.train(trainingData, lgraphOrLayers, options, params);

Error in TrainingsmokedetectionwithRCNN (line 22)
detector = trainRCNNObjectDetector(trainingData, layers, options, 'NegativeOverlapRange', [0 0.3]);

[Dinesh Yadav]

"The class names of layer 13 must match the class names of the training data. The training data class names are given by categories(Y), where Y are the training data labels". The error you displayed is self explanatory. Kindly output and compare the training data class labels with categories(Y) word to word i.e. Spacing, Capitals etc.