Adaptive Server 12.5 introduces support for wider columns, more columns, a larger number of user logins, and multiple logical page sizes. To support these extended limits, there have been several changes to existing system catalogs. See What’s New in Sybase Adaptive Server 12.5? for a complete list of catalogs that are affected by the relaxed server limits.
WARNING! As system catalogs are copied during the upgrade process, the size of these catalogs might cause the upgrade step to take a long time. Do not attempt to abort the process using Ctrl-C, as this can cause unknown corruptions in the catalogs.