I'm getting an error using the Discrete-Time VCO block when placed in a Function-Call Subsystem and need a work-around to solve this.

My error is: Invalid hybrid sample time at 'Input_Port_1' of S-Function '.../Discrete-Time VCO/Inherit Shape' . Hybrid sample time is not supported by S-Functions that are multirate or use port-based times."

This model works when not inside a Function-Call Subsystem and questioning if there is a solution to this? I have to run this inside of this since I'm trying to generate code that is interupt based.