Informix Error -4340: The variable variable-name is too complex a type to be used in an expression.

Reasons / Common Causes

-4340 fires when a variable with multiple components is used directly in an expression — per the official guidance, "too complex" means "has too many component parts"; an array needs a subscript to select one element, and a record or object needs one of its components chosen. NewEra programs return this error.

1. An array used without a subscript in an expression, per the official guidance — the first named case.
2. A record or object used without selecting a single component in an expression, per the official guidance — the second named case.

Solutions / Resolution

1. Provide a subscript to select one array element, per the official guidance.
2. Choose one component of the record or object, per the official guidance.

Examples

A record used directly in an expression

DEFINE rec RECORD
  qty INTEGER,
  price DECIMAL
END RECORD

LET x = rec + 1
-- -4340: rec has multiple components; expressions need a single component

Corrected

LET x = rec.qty + 1

Diagnostic Checks

1. Check the flagged variable's type, and provide a subscript (array) or select a single component (record/object) as required.

Related Errors / Related Topics

• -4334 — "The variable variable-name in its current form is too complex to be used in this statement." A closely related error covering the same condition in the classic 4GL context.

A record, object, or array is used directly in an expression — provide a subscript or select a single component.