Component Object Model (COM) Error – EVENT_E_INVALID_EVENT_CLASS_PARTITION 0x8004020F

In this post, you’ll learn about the error “EVENT_E_INVALID_EVENT_CLASS_PARTITION 0x8004020F” that is returned when working with COM based APIs or libraries in Windows.

COM Error Message


What is COM?

Microsoft’s COM stands for Component Object Model. Component Object Model (COM) is a networked, object-oriented framework for building interoperable binary software components.   Microsoft’s OLE (compound documents), ActiveX (Internet-enabled components), and other products are built on the COM base technology.

Error Description

Below is the description of this COM Error.

The event class for this subscription is in an invalid partition