Error in SIL execution for model within a resettable subsystem

Hello,

I am trying to test my model using simulink test, by placing it within a resettable subsystem, however only the MIL mode passes and the SIL mode fails for the reset functionality with a message "Simulation Error: Subsystem Model_xxx contains referenced models, which is not supported for SIL and PIL simulations.". The model within the resettable subsystem contains 2 Unit Delay blocks with the 'Initial Condition' set which I want to reset. I would appreciate any hints or alternate options to test the rest functionality in SIL mode.

Thanks,

Jerome.