Determine which initialization mode to use.
In most situations, using simplified mode offers many benefits. To determine which mode to use, see:
Set the initialization mode using the Configuration Parameters > All
Parameters > Underspecified initialization
detection parameter. Set the parameter
Classic (default) or
If you use simplified mode, you might need to modify your model to change the initialization mode for an existing model that is in classic mode to use simplified mode. For details, see Convert from Classic to Simplified Initialization Mode.