There are several precautions you should take before upgrading SQL Anywhere:
Check the behavior changes Confirm that none of the documented behavior changes affect your application. If they do, you must update your application. See What's new in version 11.0.1.
Test your application Test your application thoroughly in a SQL Anywhere 11 environment before upgrading any applications in production use.
Use the correct version of the utilities Make sure you use the correct version of the database utilities with your new database. See Using the utilities.
Validate and back up the database Before you begin an upgrade, validate your database, and back up your software and database. To ensure future recoverability, complete a backup of the database when you finish the upgrade.
Synchronize before upgrading For databases involved in synchronization, such as UltraLite databases or SQL Anywhere remote databases in MobiLink installations, you must perform a successful synchronization before upgrading.
Test your upgrade procedure Test your upgrade procedure carefully before carrying it out on a production system.
SQL Anywhere is used in many different configurations, and no upgrade guidelines can be guaranteed for all cases.
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