about mcc compiler ,i really need help!!

i Already set up "mbuild -setup" and "mex -setup" but if run my example. i want to do exe file

%-------------
function y=add(a,b)

a=3;

b=4;

y=sqrt(a^2+b^2)

end
%---------------

the command windows will show the error messages:

Error: An error occurred while shelling out to mbuild (error code = 1). 
Unable to build executable (specify the -v option for more information). 
??? Error using ==> mcc
Error executing mcc, return status = 1.

[Abhiram Bhanuprakash]

Can you execute the mcc command with the -v flag? It would give the verbose packaging log. Can you also share the 'PackagingLog.txt', which would have been created in the project folder where the folders like 'forRedistribution' are located?