E2563 Specified interface type is not declared (Delphi)
Go Up to Error and Warning Messages (Delphi)
This occurs when you define an interface and in the inheritance you use different type restrictions between the inheritance expression and the methods you implement.
program E2563;
{$APPTYPE CONSOLE}
uses
SysUtils;
type
IMyIntf<T> = interface
procedure IProc(A: T);
end;
TClass = class(TInterfacedObject, IMyIntf<String>) //E2563
procedure IMyIntf<Integer>.IProc; //E2563 ImyIntf<Integer> not defined
// You should use either String or, in the inheritance expression, use class(TInterfacedObject, IMyIntf<Integer>)
end;
begin
end.