Verify that the value specified for the INTF/-i option is defined to the TCP/IP instance named tcpname. For an OSM interface, verify that the user ID has the RACF authority to use that interface. For more information about OSM interface authorization, see OSM Access Control in z/OS Communications Server: IP Configuration Guide. You can use the Netstat command to verify the interfaces defined to a TCP/IP instance. Reissue the Ping command with a valid value for the INTF/-i option. For more information about Ping, see z/OS Communications Server: IP System Administrator's Commands.