Informix Error -4070

-4070 Cannot assign to "SELF".

This statement would assign a new value to the implicit function argument named SELF. Since the value of SELF is used implicitly in any reference to a member of the self object, assignment to it is not permitted.

Oninit® Troubleshooting Guidance

Reasons / Common Causes

-4070 fires when a statement tries to assign a new value to SELF — per the official guidance, SELF is used implicitly in any reference to a member of the current object, so assigning to it directly isn't permitted.

An assignment statement targeting SELF directly, per the official guidance — the direct, only cause.

Solutions / Resolution

Assign to individual members of SELF instead of SELF itself.

Examples

Assigning directly to SELF

FUNCTION Order()
  LET SELF = otherOrder
  -- -4070: SELF cannot be assigned a new value
END FUNCTION

Corrected

FUNCTION Order()
  LET SELF.order_id = otherOrder.order_id
END FUNCTION

Diagnostic Checks

Check for any statement assigning directly to SELF, and rewrite it to assign to SELF's individual members instead.

Related Errors / Related Topics

-4021 — "A class member cannot be named "SELF"." A related SELF-identifier restriction, about naming a member SELF rather than assigning to SELF itself.

A statement tries to assign a new value to SELF directly — assign to its individual members instead.