Error 0x88781102

Value: -2005397246 | 0x88781102 | 2289570050

What does it mean ?

DMUS_E_PORTS_OPEN  
The requested operation cannot be performed while there are instantiated ports in any process in the system.
Value: 4354 | 0x1102 | 0b0001000100000010

Where does it come from ?

FACILITY_DIRECTMUSIC  
Direct Music (part of DirectX) - Audio
Value: 2168 | 0x878 | 0b100001111000

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