Verify that your current Adaptive Server installation is at version 12.5.x by running the following query from isql:
1> select @@version 2> go
If your server is not running, you can get a version string by running:
$SYBASE/$SYBASE_ASE/bin/dataserver -v
If this shows that the Adaptive Server is not at version 12.5.x, you must upgrade Adaptive Server. See Chapter 5, “Upgrading Adaptive Server.”
If your server is at a 12.5.x version level, you can begin installing Adaptive Server 12.5.4.