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Informix Error -4133: Only events can be posted.

Cause and resolution

Only events can be posted.

A POST statement specified something other than event. Member functions, handlers, and reports cannot be posted.

Oninit® Troubleshooting Guidance

Reasons / Common Causes

-4133 fires when a POST statement targets something other than an event — per the official guidance, member functions, handlers, and reports can't be posted.

  1. A POST statement naming a member function, handler, or report, per the official guidance — the direct, only cause.
Solutions / Resolution
  1. Post an event instead, per the official guidance.
Examples
Posting a handler
POST myHandler
-- -4133: myHandler is a HANDLER, not an EVENT
Corrected
POST MyEvent
Diagnostic Checks
  1. Check the target of every POST statement, and confirm it's declared as an EVENT.
Related Errors / Related Topics
  • -4130 — "Handler can't be invoked directly." A related restriction on CALL (rather than POST), reinforcing the same handler-vs-event distinction.

A POST statement targets something other than an event — post the event instead.