If errors occur when you execute the SDBUPD program, the program terminates with a message describing the cause of the error.
1. An unexpected error occurred when you executed SDBUPD.
2. You are attempting to use SDBUPD to switch to a software version that is lower than your current version (called a downgrade in the following). Examples of this situation:
Ў You selected the wrong software version by mistake.
Ў The upgrade of the database instance terminated with an error. You then tried to use SDBUPD to return to the original software version.
Ў The database instance upgrade was successful, however, you want to return to a lower software version for other reasons.
You cannot use SDBUPD to downgrade software. If you want to use SDBUPD, the new software must have at least a higher build number (Version Notation).
Proceed as follows in each case.
No database instances exist that refer to a higher software version.
Database instances exist that refer to a higher software version. You want to downgrade the software that is used exclusively by the database instance (Dependent Software).
Database instances exist that refer to a higher software version. You want to downgrade the software that is not used by the database instance, or whose version is not relevant for the database instance (Independent Software).