In order for dbmlsync to function properly, both the major and minor versions of dbmlsync.exe must match those of the database server. In addition, the major version of the database file must match that of dbmlsync.exe, and the minor version of the database file must be equal to or less than the minor version of dbmlsync.exe. The database file's version is the latest version to which it has been upgraded.

For example, the 9.0.2 version of dbmlsync should only be used with the 9.0.2 version of the database server (dbeng9.exe) and it can work with database files from versions 9.00, 9.01 and 9.02.