Error in image processing, detectSURFFeatures

Hello

A = imread('pnt.jpg');
I = rgb2gray(A);
corners = detectFASTFeatures(I,'MinContrast',0.8);
J = insertMarker(I,corners,'circle');
point = detectSURFFeatures(I);
figure;
imshow(J);
figure;
imshow(I);
title('Strongest Feature Points');
hold on;
plot(selectStrongest(point, 5));
imshow(J);

I have this error

Operands to the || and && operators must be convertible to logical scalar values.

Error in vision.internal.FeaturePoints/plot (line 152)
                if k==1 && ~wasHeld

Error in SURFPoints/plot (line 172)
           h = [e-mail](this, ...

[Image Analyst]

The error message does not mention the line of your code that caused the error. Please copy the whole error message, including the part that mentions the line number and code of your code.

[Dima Lisin]

Hi Massimo,

Which version of MATLAB are you using? Also, could you post a link to the actual image that you've used?