A VSAM sphere is considered to be a single data set by the CONVERTV command. As a result, either all the data sets of the sphere are converted or none of them are.

You must direct all parts of a VSAM sphere (the base cluster, base cluster components, alternate indexes, alternate index components, and paths) to the same catalog by using an alias. If they are not directed to the same catalog, the sphere cannot be converted to SMS management. To correct this problem you can either rename the data sets in the sphere, or add or delete catalog aliases, and rerun the CONVERTV command.