If you have multicluster control data sets that are defined as VSAM key ranges, then you need to convert those control data sets to not use VSAM key ranges. A good time to convert the control data sets to be non-key range is during a planned reorganization of the control data sets. To do the conversion, remove the key range keyword from the IDCAMS DEFINE statements that are used to define the multicluster control data sets. Then follow your normal reorganization process. When you restart DFSMShsm, because the VSAM key ranges are not present, DFSMShsm dynamically calculates the key boundaries of each cluster. You can use the QUERY CONTROLDATASETS command to view both the low and high keys that DFSMShsm calculated for each cluster.