Error 0x80045042

Value: -2147200958 | 0x80045042 | 2147766338

What does it mean ?

SPERR_XML_BAD_SYNTAX  
The xml parser failed due to bad syntax.
Value: 20546 | 0x5042 | 0b0101000001000010

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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