Matlab 2012b error in neural network Non-singleton dimensions of the two input arrays must match each other.

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The Zed
The Zed 2020-4-12
i wrote my script to split dataset into XTrain, YTrain, XTest and YTest.
the dimensions are equal for all matrix example sample size e.g. size is following for above matrix
XTrain = 25 X 256 (double)
YTrain = 11 X 256 (double)
XTest = 25 X 256 (double)
YTest = 25 X (double)
my code is following
setdemorandstream(491218382);
net = patternnet(10);
[net,tr] = train(net, XTrain, YTrain);
nntraintool;
plotperform(tr);
testY = net(XTest);
The training part is good but when the last line is called the error is thrown instantly
Error using bsxfun
Non-singleton dimensions of the two input arrays must match each other.
I have already searched and found many explanations but i can't understand them specialy the solution mentioned in this Link
Could any body please explain the core anatomy behind this problem in the context of my spliting of dataset

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