Error in the class definition (Error 1735)

You have attempted one or more of the following invalid operations:

• Used CREATEOBJECT( ) in a class definition.
  
  
• Deleted grid columns in a class definition by setting the ColumnCount in the parent class to one value, and then setting the ColumnCount to a lower value in the child class.
  
  
• Deleted pageframe-type pages in a class definition by setting the PageCount in the parent class to one value, and then setting the PageCount to a lower value in the child class.
  
  
• Used the ADD OBJECT a[1] clause of the DEFINE CLASS command, where a is not an array.