Special considerations exist for downgrading Adaptive Server version 15.7 that uses replicated databases,
If the server you are downgrading from has replicated databases and SQL replication has been enabled, you must follow different procedures depending upon the version of Adaptive Server you are downgrading to.
If your replication system is using RepAgent and you are downgrading to a 15.0.2 ESD #3 or later, there are no additional steps required. Adaptive Server 15.0.2 ESD #3 can keep the data synchronized.
If you are not using RepAgent, consult the specific documentation for the product you are using to replicate data.
If you downgrade to a version earlier than 15.0.2 ESD #3, Sybase recommends that you use the standard documented procedure to downgrade an Adaptive Server with replicated databases.