Although a communication conversation was allocated, the application server refused to connect because it has a real-RDB-name that is different from that to which the application would like to connect.
Examine the sqlhosts file on the Gateway computer. Identify the entry with the alias-RDB-name to which the application is referring.
If SNA network protocol is used to connect to the application server, ensure that the "hostname" field contains a correct value.
If TCP/IP network protocol is used to connect to the application server, ensure that the "RDB=real-RDB-name" option in the "options" field contains a correct value.