WSAESHUTDOWN - Error 10058

Question/Problem: Cannot send after socket shutdown.

Answer/Solution: A request to send data was disallowed because the socket had already been shut down with a previous shutdown call. By calling shutdown, you do a partial close of a socket, which means you have discontinued sending. The Winsock implementation will not allow you to send after this.

When you get this error it usually means the system was trying to send a message that was larger than the receiving system would accept OR the receiving system had a disk full condition (or something similar).  The receiving system just stops receiving and has to close the socket to do so.