Singularity error in powergui

I am new in simulink. I am trying to model a system including both control and power segments connecting with a "Controlled Voltage Source". I have used fixed-step continuous ode3 simulation with time step equal to 60 (to simulate one minute). In powergui I have chosen continuous simulation with same time step (60). But after a few seconds I got the following error:

"Derivative input 1 of 'HRES/powergui/EquivalentModel1/State-Space' at time 31650.0 is Inf or NaN. Stopping simulation. 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)."

I do not have any sub-system based on state-space in my design and it seems that powergui generate one automatically to simulate the power segment.

I cannot solve the problem, help me please. I got stock for a week:(

P.S. When I change the powergui using discrete simulation, it works but I got the above error when I am trying to sumulate continusly.

Answer 1

[Veera Kanmani]

https://in.mathworks.com/matlabcentral/answers/99084-why-am-i-receiving-error-messages-about-singularities-in-my-simulink-model