PLS-00503

Error: PLS-00503: RETURN value statement required for this return from function

Causa: In a function body, a RETURN statement was used that contains no expression. In procedures, a RETURN statement contains no expression because the statement returns control to the caller. However, in functions, a RETURN statement must contain an expression because its value is assigned to the function identifier.

Acción: Add an expression to the RETURN statement.