请教各位，ode45解16位未知数的微分方程

lhy

x0=[0.01;0;0.01;0;0.01;0;0.01;0;0.01;0;0.01;0;0.01;0;0.01;0];
tspan=0:T/100:100*T;
[t,x]=ode45('bently',tspan,x0);

提示出错：
Warning: Failure at t=5.798867e-004.  Unable to meet integration tolerances without reducing the step size below the smallest value allowed (1.734723e-018) at time t.

请教 改如何改呢？