MATLAB: System date and time in XPC target model

dateembedded matlab functionsimulinktimexpc target

I need to get the system date and time in my simulink model, which is used for XPC target. In simulink, this is not a problem, using the embedded matlab function with the following code:
function [Y, M, D, H, MN, S] = sysClock()
coder.extrinsic('clock');
Y = 0;
M = 0;
D = 0;
H = 0;
MN = 0;
S = 0;
[Y, M, D, H, MN, S] = clock;
end
However, this block gives me error messages when I try to compile it to XPC. Is there another way? Or do I need to change the code? Shouldn't be such a difficult problem I would say…
Thanks!!