Informix Error -4013

Reasons / Common Causes

-4013 fires when a function is declared with a leading ! that isn't one of the supported intrinsic names — per the official guidance, the supported intrinsic member functions are !copy(), !derive(), and the constructor (named after the class); no other functions may begin with !.

1. A function name beginning with ! that isn't !copy(), !derive(), or the constructor, per the official guidance — the direct, only cause.

Solutions / Resolution

1. Check the spelling of the name, per the official guidance.
2. If it isn't one of the supported names, declare the function as a normal member function (without the leading !), per the official guidance.

Examples

An invalid intrinsic-style name

CLASS Order
  FUNCTION !validate()
    -- -4013: !validate is not !copy(), !derive(), or the constructor
  END FUNCTION
END CLASS

Corrected

CLASS Order
  FUNCTION validate()
    ...
  END FUNCTION
END CLASS

Diagnostic Checks

1. Check every function name beginning with !, and confirm it's !copy(), !derive(), or the class constructor.

Related Errors / Related Topics

• -4000 — "Intrinsic member functions cannot be declared as SHARED." A related intrinsic member-function rule, about the SHARED keyword rather than the function's name itself.

A function name uses the ! prefix reserved for intrinsic member functions but isn't one of the supported names — rename it as a normal member function.