Error 0x80042930

Value: -2147210960 | 0x80042930 | 2147756336

What does it mean ?

VDS_E_VD_DISK_ALREADY_OPEN  
The virtual disk is already open and cannot be opened a second time. Please close all clients that may have opened the virtual disk and retry.
Value: 10544 | 0x2930 | 0b0010100100110000

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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