Informix Error -4026

-4026 Member "name" is already defined in base class "class".

A derived class inherits all the members of its base classes. You cannot add a member that has the same name as a member from the base class.

Oninit® Troubleshooting Guidance

Reasons / Common Causes

-4026 fires when a derived class adds a member with the same name as one it already inherits from a base class — per the official guidance, a derived class inherits all base-class members, so it can't add a new member sharing a base member's name.

A derived class declaring a member name that already exists on a base class, per the official guidance — the direct, only cause.

Solutions / Resolution

Choose a different name for the new member, since the base class's member of that name is already inherited, per the official guidance.

Examples

A derived class re-adding an inherited member name

CLASS Base
  DEFINE total DECIMAL
END CLASS

CLASS Derived DERIVED FROM Base
  DEFINE total DECIMAL
  -- -4026: total is already inherited from Base
END CLASS

Corrected

CLASS Derived DERIVED FROM Base
  DEFINE subtotal DECIMAL
END CLASS

Diagnostic Checks

Check every base class's members before adding a new member to a derived class, and rename it if it collides.

Related Errors / Related Topics

No closely related error codes are cross-referenced for -4026 in this set yet.

A derived class's new member has the same name as one already inherited from a base class — choose a different name.