Debuging continuous states in a discrete simulation

My simulation fails because The "VariableStepDiscrete" solver cannot be used to simulate block diagram 'Model_Name because it contains continuous states.

How do I troubleshoot? The Sample Time Display doesn't work because the failure occurs before the Sample Time Display is built.

Thanks.

Answer 1

[Kaustubha Govind]

The error occurs because you have continuous states in your model (for example, blocks from the Continuous sub-library in the Simulink library may have continuous states - like the integrator block), not necessarily continuous sample-times. You should switch to a solver that can solve continuous states (see Solvers), like ode45.

Answer 2

[Stephen]

ode45 worked -- thanks.