How can I use a continuous integrator in atomic subsystem?

      Hello people! In my simulation I must use a fixed step size (0.001 s) with the solver ode3 (Runge-Kutta). There is an atomic subsystem with sample time of 1s in my model,and the atomic subsystem have a continuous integrator in it .
      So,when I start the simulation ,I got an error :'... \integrator'  has an invalid sample time of [0, 0]. Periodic atomic subsystem 'untitled/Subsystem' may contain only blocks that have constant (inf), inherited (-1), or periodic (1) sample times.
       how can I fix it ?thank you very much.

Answer 1

[Ryan G]

The error you are seeing is effectively saying you cannot have continuous blocks if you define a discrete sample time on the atomic subsystem. You can use a discrete integrator to resolve this. Since you are taking such large steps I would imagine that the results would be comparable.