Error while bringing Unsupported custom storage class 'Default' for symbolic dimension kfi_Tau. Specify one of the following custom storage classes:

When I create a SIL test harness for a subsytem I get this error:

Error while bringing model references of model KalmanFilter_2x2_SIL up to date: Unsupported custom storage class 'Default' for symbolic dimension kfi_Kalman_Tau. Specify one of the following custom storage classes:

- Define or ImportedDefine with header file specified

- CompilerFlag

- SystemConstant (AUTOSAR.Parameter)

- User-defined custom storage class that defines data as a macro in a specified header file

To disable symbolic dimension propagation, search for 'Allow symbolic dimension specification' in the Configuration Parameters dialog box and clear the checkbox.

How do I solve this error?