>>I forgot to mention that only when the Array is a property of a class.
>
>It appears you are indeed correct. It puts VFP into a spin. The value in the Reserved3 field for the property is trying to dimension the array to a negative value.
>
>You can get around this by redimensioning the array property in the Form.Init or in the Form.Load code.
>
>DIMENSION thisform.aArray[50000]

The Class Designer behavior depends on VFP base class. With form base class it converts any value greater than 32767 into negative number. With custom base class it dosn't allow to enter value greater than 32767. I didn't try any other base classes.