For clients from version 2003.06.xx to work in a mixed environment with version 7.0, the database alias must be the same as the database name for all of the DB2 databases running Rational® ClearQuest® schema repositories and user databases.
If the database alias and the database name are different for any database, create a new database alias on the DB2 server that is the same as the alias name used with older releases.
For example, if you have an existing deployment where Rational ClearQuest clients connect to a database named wr123 using an alias of pq456, create a new alias called pq456 on the DB2 database server. This new alias will allow version 7.0 clients to connect using the alias name instead of the actual database name, because the server will accept connections using the pq456 alias and resolve them to the wr123 database name.