Error 0x80040D8E

Value: -2147218034 | 0x80040D8E | 2147749262

What does it mean ?

GTHR_E_NESTED_HIERARCHICAL_START_ADDRESSES  
Hierarchical content sources such as those in the file system cannot be nested.
Value: 3470 | 0x0D8E | 0b0000110110001110

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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