In this post, you’ll learn more about the Error CO_E_EXIT_TRANSACTION_SCOPE_NOT_CALLED
0x8004E031 that is returned when working with the COM-based APIs in Win32
Win32 COM Error
CO_E_EXIT_TRANSACTION_SCOPE_NOT_CALLED
0x8004E031
Win32 COM Error Error Description
The component made a call to EnterTransactionScope, but did not make a corresponding call to ExitTransactionScope before returning.