Problem regarding the input parameters for 'imrect'

I am using the command 'imrect' in my program... The following is the example which I referred from mathworks.

 figure, imshow('pout.tif');
 h = imrect;
 position = wait(h);

Similar to the above code, mine goes something like this:

 [q,r,z]=size(s);
 h = imrect;
 position = wait(h);

where 's' corresponds to my image.

My problem is when I first run the code on R2007b, there was no error. But now when I run it, it asks for input parameters for imrect. Even the code given as an example is not working. Is there a problem with the code or the matlab version? Can anybody help me with this?

[Geoff Hayes]

Nagaveni - please post the full error message and code that is leading to this error. I notice that you haven't called imshow(s) for your image. Have you called that code and just not copied it here?

[Nagaveni S A]

Sorry for replying so late. I have no errors now. I ran the same program in Matlab R2013a version and it did not show any errors. I guess maybe the problem was the matlab version. But thanks anyway for you answer.

I do have another question: http://www.mathworks.com/matlabcentral/answers/183333-steganography-hiding-and-extracting-text-in-image Could you please take a look at it? Thank you again.