Too Many input arguments

in this code :

load('handFrontalClosedSession.mat');
imDir = fullfile ('/Users/aZahran/Desktop/TrainingSet');
addpath('/Users/aZahran/Desktop/TrainingSet');
negatives = fullfile ('/Users/aZahran/Desktop/negativeSet');
trainCascadeObjectDetector('stopSignDetector.xml',positiveInstances,negatives);

I changed some stuff in both folders, TrainingSet and negative Set, but the code was the same and it started throwing this exception, I reduced the data back to roughly their original sizes but not the same data, couldn't recognise the old ones from the new ones, but I think it has nothing to do with the data, any help would be appreciated the exception :

Error using trainCascadeObjectDetector (line 245)
Too many input arguments.

Error in Untitled (line 5)
trainCascadeObjectDetector('HandDetectorHaar.xml',positiveInstances,negatives,'TruePositiveRate',0.995,'FeatureType','Haar','NumCascadeStages',14);

[Adam]

What is positiveInstances in your code?

[Ahmed Zahran]

a struct of the exported ROIs from the image labeller

[Dima Lisin]

Hi Ahmed,

Your code doesn't seem to match the line that the error refers to. Can you please post the actual code that is causing the error?