Loading Database Dumps During Downgrade

Adaptive Server does not automatically block attempts to downgrade to a minor version; however, do not attempt this, as the database dump can corrupt the server into which you are loading the dump.

When you downgrade from a version of Adaptive Server to a lower major version (such as version 15.x to 12.5x), Adaptive Server blocks the attempt with a message similar to:

ASE cannot load this database dump because the version in the
dump is newer than the version in the database. Database: log version=7, 
upgrade version=35. Dump: log version=7, upgrade version=40.

To load the dumps of 15.5 into a server of a minor version (such as 15.0.1):

Execute sp_downgrade in the 15.5 version Adaptive Server to downgrade the databases to be dumped.
After the downgrade succeeds, dump the downgraded databases in the 15.5 server.
Load the dumps of downgraded databases into the 15.0.1 server.