Error 0x0004501A

Value: 282650 | 0x0004501A | 282650

What does it mean ?

SP_LEX_NOTHING_TO_SYNC  
The client is currently synced with the lexicon.
Value: 20506 | 0x501A | 0b0101000000011010

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

Other Errors for FACILITY_ITF