If you also need to restart your Db2 or IMS subsystem, ensure that the XBM subsystem has completely started before starting the DBMS. When XBM finishes initializing, it issues message BMC73150I. Do not start the DBMS until XBM issues this message. By waiting until XBM initializes, you ensure that XBM will communicate properly with the DBMS. If your Db2 or IMS subsystem is available before you start the XBM subsystem, you do not need to restart that subsystem. XBM will communicate with that DBMS normally.