Use the property to specify the maximum number of classes that IBM® Rational® Rhapsody® should include in a single code generation "chunk". Above this number, the code generation action will be broken into a number of smaller code generation actions.
For example, if you specify 500 for the value of the property, then if your model has 501-1000 classes, Rational Rhapsody will try to break the code generation action into two smaller code generation actions.