Error 0x8004292F

Value: -2147210961 | 0x8004292F | 2147756335

What does it mean ?

VDS_E_VD_IS_ATTACHED  
The requested operation cannot be performed while the virtual disk is attached.
Value: 10543 | 0x292F | 0b0010100100101111

Where does it come from ?

FACILITY_ITF  
COM/OLE Interface management. FACILITY_ITF is designated for user-defined error codes returned from interface methods
Value: 4 | 0x004 | 0b00000100

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