Error 0x80042937

Value: -2147210953 | 0x80042937 | 2147756343

What does it mean ?

VDS_E_VD_IS_BEING_ATTACHED  
The requested operation cannot be performed while the virtual disk is being attached.
Value: 10551 | 0x2937 | 0b0010100100110111

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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