If you have been using the Derby database in a development
installation and you plan to reinstall SAP Mobile Platform Server, preserve
data by backing up the SAP Mobile Platform Server databases.
With SAP Mobile Platform Server stopped,
use operating system commands to copy the entire directory structure
from SMP_HOME/Server/db/derby/smp3/ to a backup location. For
alternative ways of backing up the Derby database, see http://db.apache.org/derby/docs/10.0/manuals/admin/hubprnt43.html.