A TARGET command with keyword MAIN was issued to reconfigure the local system as the new MAIN system. RACF® must access the workspace data sets used by the old MAIN system. In this case, RACF has looked for the PREFIX and LUNAME value that was specified on the TARGET statement for NODE node-name SYSNAME system-name and determined that one or both are missing. Because RACF cannot access the old MAIN's workspace data sets, the multisystem node is not reconfigured.