Deleting MSNAME definitions from the SYSID tables in an IMSplex

To remove a SYSID or an MSNAME statement from the IMSplex, you must first remove it from the IMS system that owns it and then cold start the IMS system back into the IMSplex.

After you have removed the SYSID or MSNAME statement from its original owning IMS system, warm or cold start each of the other IMS systems in the IMSplex to rebuild their SYSID tables.