Error 0x800401C4

Value: -2147221052 | 0x800401C4 | 2147746244

What does it mean ?

CONVERT10_E_STG_FMT  
Contents of the IStorage not in correct format
Value: 452 | 0x01C4 | 0b0000000111000100

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