Derivative of state '1' in block 'integrator' at time 0.0 is not finite.

Hello,

I have modelled a superheater using simulink. And I have used a PI controller to tune the system. now I need to perform a sensitivity analysis of the system. when I am trying to persorm the sensitivity analysis I am getting the following error.

Derivative of state '1' in block 'integrator' at time 0.0 is not finite.he simulation will be stopped. There may be a singularity in the solution. If not, try reducing the step size (either by reducing the fixed step size or by tightening the error tolerances)

If i run in general it works fine. Is there any solution for this error. I am using ODE15s solver.

[patr chri]

Try putting a delay in the feedback loop or check your model for minor errors (e.g. wrong initialization of values etc)

[vishnuvardhan naidu tanga]

I tried but it didnt work

[suWits Mohrarsii]

set Start time value is than 0