Error 0x80042321

Value: -2147212511 | 0x80042321 | 2147754785

What does it mean ?

VSS_E_SOME_SNAPSHOTS_NOT_IMPORTED  
Some shadow copies were not successfully imported.
Value: 8993 | 0x2321 | 0b0010001100100001

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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