Error 0x800401FC

Value: -2147220996 | 0x800401FC | 2147746300

What does it mean ?

CO_E_OBJISREG  
Object is already registered
Value: 508 | 0x01FC | 0b0000000111111100

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