E2217 Published field '%s' not a class or interface type (Object Pascal)
An attempt has been made to publish a field in a class which is not a class nor interface type.
program Produce; type TBaseClass = class published x : Integer; end; begin end.
The program above generates an error because x is included in a published section, despite the fact that it is not of a type which can be published.
program Solve; type TBaseClass = class Fx : Integer; published property X : Integer read Fx write Fx; end; begin end.
To solve this problem, all fields which are not class nor interface types must be removed from the published section of a class. If it is a requirement that the field actually be published, then it can be accomplished by changing the field into a property, as was done in this example.