The configuration is only activated once for the SMS complex. It is not necessary to activate a configuration from every system in the SMS complex. After activating SMS with a null configuration, activate an SMS configuration contained in a valid SCDS on the same system. You can use either the ISMF ACTIVATE command or the SETSMS operator command. Both procedures copy the contents of the SCDS to the ACDS specified in IGDSMSxx.

When an SMS control data set that supports only eight names is accessed for update on a system running in 32-name mode, you must convert the data set to a new, incompatible format in order to support 32 names. Confirm this conversion, using the operator console or ISMF. This conversion is permanent, so you should make copies of your control data sets before the system mode is converted.