Error 0x80070500

Value: -2147023616 | 0x80070500 | 2147943680

What does it mean ?

ERROR_ALREADY_FIBER  
The current thread has already been converted to a fiber.
Value: 1280 | 0x0500 | 0b0000010100000000

Where does it come from ?

FACILITY_WIN32  
Provides a way to handle error codes from functions in the Win32 API as an HRESULT. (Error codes in 16 - bit OLE that duplicated Win32 error codes have also been changed to FACILITY_WIN32)
Value: 7 | 0x007 | 0b00000111

Other Errors for FACILITY_WIN32