where is the error of following code to calculate confusionmat?

predictedLabels = predict(classifier, testFeatures);
testLabels = testSet.Labels;
confMat = confusionmat(testLabels, predictedLabels);
confMat = bsxfun(@rdivide,confMat,sum(confMat,2))

error is: G and GHAT need to have same number of rows

[Walter Roberson]

What shows up for size(testLabels), size(predictedLabels) ?