Informix Error -1392: Cannot use a NULL object.

Reasons / Common Causes

-1392 fires in the p-code runner when a NULL object is dereferenced — per the official guidance, this typically happens when a program defines an object but tries to invoke a member function on it before actually instantiating it (e.g. via !copy() or !derive()).

1. A member function invoked on an object variable that was never instantiated, per the official guidance — the direct, common cause.
2. An object variable that's genuinely NULL at the point of use, from earlier logic that set it that way (or never set it at all).

Solutions / Resolution

1. Instantiate the object before invoking member functions on it, per the official guidance — via !copy(), !derive(), or the appropriate construction mechanism for the class.
2. Check whether the object could genuinely be NULL at this point in the logic, and guard against invoking members on it if so.

Examples

Invoking a member function on an uninstantiated object

DEFINE v_order Order.Class
CALL v_order.getTotal()
-- -1392: v_order was never instantiated

Corrected

DEFINE v_order Order.Class
LET v_order = NEW Order.Class()
CALL v_order.getTotal()

Diagnostic Checks

1. Trace the object variable's lifecycle back to confirm whether and where it was actually instantiated before the failing member-function call.

Related Errors / Related Topics

No closely related error codes are cross-referenced for -1392 in this set yet.

A NULL object was dereferenced — instantiate it before invoking member functions.