Page History

Server Version > Client Version 
(5.3.3 and or above)

6.3.1

5.3.3

Succeeds

Backward compatibility is supported for 5.3.3 and or above.

Server Version > Client Version 
(5.3.1 and or below) 

6.3.1

4.3.9

Fails

Backward compatibility is supported only if the version of both the server and client is 5.3.3 and or above. 
Since the client version is older than 5.3.3, backward compatibility is not supported. For 4.3.9, connection succeeds only if the cm protocol versions are the same.

ServerVersion < Client Version 

6.1.1

6.3.1

Fails

If the version of the client is newer than the server, connection fails regardless of the Altibase version. 
The version of the client must be the same or older than the server.