See the explanation for message IEA523W. Verify that the IODF contains devices that are defined to MVS™. Verify that the necessary UIMs supporting these devices are present in SYS1.NUCLEUS. If the problem persists, search problem reporting databases for a fix for the problem. If no fix exists, ask the operator to obtain the stand-alone dump. Contact the IBM® Support Center. Provide the stand-alone dump and the accompanying message.