How to solve convolution problem in 2d cross correlation?

I am trying to cross correlate in 2d (xcorr2) of two .mat files. The data is too big to attach in this question here which exceeds 5MB. The code is as follows-

load rf_predeform.mat;
load rf_postdeform.mat;
xcorrelation = xcorr2('rf_predeform','rf_postdeform');
figure, surf(xcorrelation), shading flat

The rf_predeform.mat is 4113*4001 double type data

The rf_postdeform.mat is 3838*4001 double type data

Now, when i ran the code there was an error shown in the command window which is-

Error in xcorr2 (line 26)

c = conv2(a, rot90(conj(b),2));

Error in xcorr2dcode (line 13)

xcorrelation = xcorr2('rf_predeform','rf_postdeform');

I can't understand problem. So how can resolve that problem.

[Kaashyap Pappu]

What was the error statement?

[Ahamed Al Arifin]

Error in xcorr2 (line 26)

c = conv2(a, rot90(conj(b),2));

[KALYAN ACHARJYA]

Can you attach thease two files rf_predeform.mat and rf_postdeform.mat?

[Ahamed Al Arifin]

The data is too big to attach in this question here which exceeds 5MB

[Vladimir Sovkov]

Why do you use the quotation marks in calling the function? If 'rf_predeform' and 'rf_postdeform' are the names of the variables loaded from your mat files, you should try:

xcorrelation = xcorr2(rf_predeform,rf_postdeform);