Only the 1st function, ode_metabolism, is called since it is considered the main function.
Your ode_q function is viewed as a local function , which must be summoned by the main function, ode_metabolism, to be used.
To fix this, either have ode_metabolism call ode_q, OR make another main function that calls ode_metabolism and ode_q as local functions, like this:
function ode_main
ode_metabolism;
ode_q;
end
function ode_metabolism
...
end
function ode_q
...
end
