Implementing dxdt in simulink

I am currently moving my system of 10 ODE's from a matlab script into a simulink setup.

From the matlab script I have a function which creates dxdt from my state variables. This can then be solved using the ODE15s in my case.

%%ODE function
dxdt = kinetics(t,x)
%code describing my system (ODE's) using x(1),x(2),x(3)... as state variables

then my function is given inital values and solved:

[t,y]= ode15s(@kinetics, t, init, options);

Then it is possible for me to plot the output y(t)

How do i transfer my ode function into simulink so it does the same thing?

Right now when i try, it says that it is missing information on the x vector (as it is not defined but solved using the ODE15s).

I have given an input (step) to produce som time steps (is this right?)

I am kind of new to simulink, so please let me know something is unclear :)

You can see a picture below:

Thanks in advance

[Birdman]

Can you share your both m files?

[Andreas Skovhøj]

Yes of course. Thank you so much :)