Error 0x80030021

Value: -2147287007 | 0x80030021 | 2147680289

What does it mean ?

STG_E_LOCKVIOLATION  
A lock violation has occurred.
Value: 33 | 0x0021 | 0b0000000000100001

Where does it come from ?

FACILITY_STORAGE  
OLE Storage. For status codes returned from IStorage or IStream method calls relating to structured storage. Status codes with code (lower 16 bits) values in the range of Windows error codes (that is, less than 256) have the same meaning as the corresponding Windows errors
Value: 3 | 0x003 | 0b00000011

Other Errors for FACILITY_STORAGE