Error 0x0004111D

Value: 266525 | 0x0004111D | 266525

What does it mean ?

IDX_S_DSS_NOT_AVAILABLE  
The search server was added successfully, but cannot be contacted. Check that the search service is executing on the remote computer, and that you can connect to the remote computer.
Value: 4381 | 0x111D | 0b0001000100011101

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

StackOverflow

Other Errors for FACILITY_ITF