Error 0x887C002E

Value: -2005139410 | 0x887C002E | 2289827886

What does it mean ?

AEERR_ADG_ALREADY_CONNECTED  
The audiodevicegraph is already connected.
Value: 46 | 0x002E | 0b0000000000101110

Where does it come from ?

FACILITY_DIRECT3D11  
Direct3D 11
Value: 2172 | 0x87C | 0b100001111100

Other Errors for FACILITY_DIRECT3D11