When you are downgrading to a version of Adaptive Server that does not support archive databases, be aware of the following:
If you must downgrade an Adaptive Server containing an archive database to a version of Adaptive Server that does not support archive databases, SAP recommends you drop the archive database before you downgrade.
To eliminate the new sysaltusages table, drop the scratch database before you perform the downgrade procedure. sysaltuages does not cause any problems if the scratch database is not dropped.
Backup Server versions 15.0 ESD #2 and later writes a format for compression (with compression = compression_level) so that the dump can be loaded into an archive database. Therefore, if you must load a compressed dump onto a version of Adaptive Server that does not support archive databases access, use the same version of Backup Server that created the compressed dump to load the compressed database dump. An earlier version of Backup Server does not support the new format of the compressed database dump.
When you are downgrading without compression, you need not worry about Backup Server at all.