The on-disk structures of stored procedures, triggers, and views may contain statement identity tokens, datatypes and object references that are not understood by the earlier Adaptive Server versions. You must drop all compiled objects that use features introduced into Adaptive Server subsequent to the release to which you are downgrading.
If you are returning to a pre-12.5.4 version of Adaptive Server, Sybase recommends that you return to 12.5.0.3. This is because 12.5.0.3 includes error handling code for unrecognized tokens or objects pertaining to features in 12.5.4. If the 12.5.0.3 Adaptive Server encounters these unknown objects, it handles them with a meaningful error message.
Should you return to a pre-12.5.0.3 version of Adaptive Server, no such soft landing is provided. Using the new features can result in inexplicable behavior, misleading error messages and stack traces.
