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Informix Error -4127

-4127 Event expected.

The identifier before the WITH clause of the HANDLE statement does not identify an event. The event must be declared in or inherited by the declared class of the target object (which can be the SELF object).

Oninit® Troubleshooting Guidance

Reasons / Common Causes

-4127 fires when the identifier before a HANDLE statement's WITH clause doesn't identify an event — per the official guidance, the event must be declared in, or inherited by, the target object's declared class (which can be SELF).

  1. The identifier before WITH isn't a declared event, per the official guidance — the direct, only cause.
Solutions / Resolution
  1. Confirm the event is declared in, or inherited by, the target object's declared class, per the official guidance.
Examples
A non-event identifier before WITH
HANDLE notAnEvent WITH myHandler
-- -4127: notAnEvent is not declared as an EVENT
Corrected
HANDLE MyEvent WITH myHandler
Diagnostic Checks
  1. Check whether the identifier before WITH is declared as an EVENT, and whether it's available on the target object's class (declared or inherited).
Related Errors / Related Topics
  • -4126 — "Handler expected." The companion error, about the handler identifier after WITH rather than the event identifier before it.
  • -4134 — "Class qualification not allowed when invoking an event." A related event-usage error, about how an event is invoked rather than whether the HANDLE identifier is an event at all.

The identifier before WITH isn't a declared event — check its declaration and availability on the target object's class.