Error in creating cross product of two vector in simulink matlab?

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MatLab

errors

simulate

simulator

hi,i want to simulate a system physical in simulink matlab rs2015.
i read from website mathworks
cross product
i.e. using this:

t1 = [2,3,1];
 t2 = [3,1,2];
 C = A(:,t1).*B(:,t2)-A(:,t2).*B(:,t1);

please see image simulink:
please see image

fcn function is defined:

function C = fcn(A,  B)
 t1 = [2,3,1];
 t2 = [3,1,2];
C = A(:,t1).*B(:,t2)-A(:,t2).*B(:,t1);

now wehn i run it:it returns this errors:

 Attempted to access index 2 of data A.

MATLAB function eML_blk_kernel in MATLAB Function MATLAB Function: C = A(:,t1).*B(:,t2)-A(:,t2).*B(:,t1);
                                                                           ^^

The valid index range is 1 to 1.

This error will stop the simulation.
Component: MATLAB Function | Category: Runtime error

An error occurred while running the simulation and the simulation was terminated

Simulation stopped because of a runtime error: out of bounds.
Component: Simulink | Category: Block error

how we can defined a function that is can operate with vector concatenate

thanks for attention

What I have tried:

i tested but not idea for doing it.....