The host name '%1' could not be found

Error code 57
Error constant SOCKET_HOST_NAME_NOT_FOUND
Parameter 1 The name of the host.
Probable cause

The given host name could not be found. Check the following: 1) The host name was correctly specified. 2) The host is accessible. Many systems include a "ping" utility that can be used to verify access to a named host. 3) The Domain Name Server (DNS), or its equivalent, is available. If the DNS is not available, try specifying the host's IP number (for example, NNN.NNN.NNN.NNN) instead of the host name. 4) The HOSTS file contains an entry that maps the host name to an IP number.