Ralph, In a very similar situation. Running z/OS 1.4 LPAR on z890. We also have z/OS 1.7 LPARS. I updated our IODF on a 1.7 LPAR, performed the POR. All LPARs IPL fine. Only caveat is the 1.4 LPAR can not view or update the IODF built on the 1.7 LPAR. Good luck, Jimmy
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