<i>Any upgrade would require you to bring the system upto the latest CUM from the IBM Fix central, for v6r1 other PTF’s for ANZOBJCN is required as well. check the site
The latest cume package <b>is not</b> required. It is, however, strongly recommended prior to any upgrade.
Nor are PTFs for ANZOBJCVN required.
The ANZOBJCVN command is very useful for locating programs that must be recompiled before they will run on i 6.1, but you might not need those programs. They might be old, obsolete or otherwise no longer needed.
If all programs were compiled on V5R1 or later or if they were compiled before V5R1 with full observability, then ANZOBJCVN isn’t needed at all. Of course, it is strongly recommended to check your program objects as early as possible in order to save time.
If you wish, you can put off compiling them until after the i 6.1 upgrade. It might even be faster to do so, as long as you don’t need to execute the programs soon after the upgrade.
If you don’t locate one or more programs that will not convert automatically, the system will send an appropriate error message when you do try to execute those programs.