In this post, you’ll learn more about the Windows Socket Error WSA_IO_INCOMPLETE
996 returned by the WSAGetLastError function in Windows as well a quick description about the error
Windows Socket Error Code
WSA_IO_INCOMPLETE
996
Windows Socket Error Description
Overlapped I/O event object not in signaled state.
The application has tried to determine the status of an overlapped operation which is not yet completed. Applications that use WSAGetOverlappedResult (with the fWait flag set to FALSE) in a polling mode to determine when an overlapped operation has completed, get this error code until the operation is complete.