I did my usual "just do it" without reading all the particulars on V5R1. OfficeVision is not only not supported in V5R1 ("not ported" is the IBM phrase), but it is deleted from the system. The IPCS is not supported and if you run TCP/IP on an ethernet card that was configured with the IPCS, you will have to physically remove the IPCS and move the ethernet card. Otherwise the upgrade went fine and the system is running smoothly. I had to write a calendar/events/messaging system from scratch to replace the OV400 calendar. That took a few hours, but is running just fine also.