Informix Error -4021

-4021 A class member cannot be named "SELF".

You cannot use SELF, regardless of letter case, as the name of a member variable, member constant, or member function. The identifier SELF is a built-in identifier that New Era provides automatically. You can refer to SELF to make your code more readable when a member has the same name as an identifier that is declared as in the global or module scope, or to access a member when a local entity has the same name.

Oninit® Troubleshooting Guidance

Reasons / Common Causes

-4021 fires when a member variable, constant, or function is named SELF — per the official guidance, SELF (regardless of letter case) is a built-in identifier NewEra provides automatically, used to reference the current object when a member shares a name with a global/module-scope identifier or a local entity.

A member declared with the name SELF, per the official guidance — the direct, only cause.

Solutions / Resolution

Choose a different name for the member, since SELF is reserved as NewEra's built-in current-object identifier, per the official guidance.

Examples

A member named SELF

CLASS Order
  DEFINE self INTEGER
  -- -4021: "self" collides with the built-in SELF identifier (case-insensitive)
END CLASS

Corrected

CLASS Order
  DEFINE order_id INTEGER
END CLASS

Diagnostic Checks

Check every member variable, constant, and function name (case-insensitively) against SELF, and rename any that collide.

Related Errors / Related Topics

No closely related error codes are cross-referenced for -4021 in this set yet.

A class member was named SELF, which is reserved as NewEra's built-in current-object identifier — choose a different name.