The COPY CLASS command uses an existing library class to copy
    and create a new class in the same library or in another library.
    The original class is left unchanged. The class attributes are
    copied in full and an identical set of element generations are
    inserted into the new class. The elements to be inserted into
    the new class must already exist in the target library.

    CMS must be able to create one new class for each old class.
    When you use wildcards, or a comma list in the input class
    specification you must specify a wildcard ("*") as the output
    class specification.