4.7.2 Notes about downgrading

Note the following when downgrading an HADB client:

When performing a version downgrade of the HADB client, install an HADB client that corresponds to the version of the HADB server.
There are precautions regarding the installation data. Before downgrading the HADB client, for the Windows version of the HADB client, refer to the notes in (1) Installing an HADB client of 4.2.1 HADB client for Windows. For the Linux version of the HADB client, refer to the notes in (2) Installing an HADB client of 4.2.2 HADB client for Linux.
Do not change the OS user during the process of downgrading the HADB client. If you change the OS user, the downgrade process might not work correctly.
Do not change the value specified for the ADBCLTLANG environment variable when downgrading the HADB client. If you change the value, the downgrade process might not work correctly.
Make sure that the versions of the HADB client and ODBC driver match. If the versions do not match, an error occurs before the HADB client connects to the HADB server.