Error 0x80040033

Value: -2147221453 | 0x80040033 | 2147745843

What does it mean ?

TAPI_E_REQUESTQUEUEFULL  
The queue of call requests is full.
Value: 51 | 0x0033 | 0b0000000000110011
IO_WARNING_PAGING_FAILURE  
An error was detected on device %1 during a paging operation.
Value: 51 | 0x0033 | 0b0000000000110011

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