Error 0x80042932

Value: -2147210958 | 0x80042932 | 2147756338

What does it mean ?

VDS_E_VD_ALREADY_COMPACTING  
The virtual disk is already in the process of compacting.
Value: 10546 | 0x2932 | 0b0010100100110010

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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