Opened 4 years ago

#19224 new defect

get_Machines not working in 6.1 API

Reported by: toptensoftware Owned by:
Component: VM control Version: VirtualBox 6.1.0
Keywords: Cc:
Guest type: all Host type: Windows


Originally posted to forum (here:, lodging as a bug report since not resolved....


I'm the developer of VBoxHeadlessTray (see here: I'm trying to get it working with the latest 6.1 SDK but I'm finding that after calling get_Machines and going through the returned array, the IUnknown for the objects are returned correctly from SafeArrayGetElement, however calling QueryInterface for IMachine fails with E_NOINTERFACE.

The IID_IMachine I'm using is {85632C68-B5BB-4316-A900-5EB28D3413DF}

Running on Windows 10, guest OS is not applicable.

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