4.6.2 Notes about upgrading

Note the following about upgrading an HADB client:

You must not change the OS user while the HADB client is being upgraded. If the OS user is changed, the HADB client might not be upgraded successfully.
You must not change the value of the ADBCLTLANG environment variable while the HADB client is being upgraded. If the value is changed, the HADB client might not be upgraded successfully.
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.