Error 0x80042591

Value: -2147211887 | 0x80042591 | 2147755409

What does it mean ?

VDS_E_SHRINK_IN_PROGRESS  
A defragmentation or volume shrink operation is already in progress. Only one of these operations can run at a time.
Value: 9617 | 0x2591 | 0b0010010110010001

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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