Sybase ADAPTIVE 15.0.2 - Manual (Page 122)

Solutions to common installation problems
106 Adaptive Server Enterprise
1 From the Upgrade window, select Exit.
2 Examine the log file created in the $SYBASE/$SYBASE_ASE/init/logs
directory to find out why Adaptive Server failed the pre-upgrade eligibility
test.
After you resolve any problems, shut down Adaptive Server and use
sqlupgrade to complete the upgrade session.
Recovering from a failed upgrade
If the upgrade process fails, the installation program displays error messages.
Review the error messages and the Adaptive Server error log to determine the
cause of the upgrade failure. For default error log locations, see Table 7-2 on
page 100.
Note Once you start ASE on the new version you cannot start ASE on the
previous version. Attempts to do so will likely result in having to restore from
backups.
Restoring from backup
You may need to restore your databases due to a failed upgrade.
If you think the upgrade failure or its cause may have damaged your databases,
restore the databases from backups. For information on restoring databases, see
the System Administration Guide.
If you are concerned about the possible corruption of your databases, exit
sqlupgrade , but do not attempt to restart the upgrade session until you have
restored the databases from backup. After restoration is complete, retry the
upgrade.
Re-running the upgrade
Failures while upgrading a server installation fall into one of two categories:
failure to upgrade an individual database, or failure to complete configuration
changes after all databases have been upgraded.