Thread Subject: integrator sample time

i have a custom library block with a component (C) that contains a continuous time integrator. i have a model that contains a switch case, and one of the cases runs component C. i am trying to build my model for xPC Target, so i set the solver type to fixed-step. if i use a discrete solver, i get a build error because C's integrator has states. if i use an ode4 solver, i get an error that says:

   Sample time [0 0] of 'WindTunnelTestOct08_4xpc/Plant/C/Integrator' does not match the sample time [0.001288659793814433 0] of the SwitchCase block ' ' controlling its execution.

the sample time of my SwitchCase block is -1. integrator has no sample time parameter. how can i fix this? or must i switch to a discrete integrator?

i am using R2007b, xPC target 3.3, Simulink 7.0.

thanks.

reilly.

Switching to a discrete-time integrator is probably your best bet.

Omur

"John Reilly" <jrhokie1.nospam@yahoo.com> wrote in message <galitl$c70$1@fred.mathworks.com>...
> i have a custom library block with a component (C) that contains a continuous time integrator. i have a model that contains a switch case, and one of the cases runs component C. i am trying to build my model for xPC Target, so i set the solver type to fixed-step. if i use a discrete solver, i get a build error because C's integrator has states. if i use an ode4 solver, i get an error that says:
>
> Sample time [0 0] of 'WindTunnelTestOct08_4xpc/Plant/C/Integrator' does not match the sample time [0.001288659793814433 0] of the SwitchCase block ' ' controlling its execution.
>
> the sample time of my SwitchCase block is -1. integrator has no sample time parameter. how can i fix this? or must i switch to a discrete integrator?
>
> i am using R2007b, xPC target 3.3, Simulink 7.0.
>
> thanks.
>
> reilly.
>