Hi Folks,

The very valuable LOOK command from File 264 of the CBT Tape
collection, which allows you to follow control blocks and browse storage
on your MVS machine, will not work on z/OS 1.9 out of the box, because
of the following reason:

In z/OS 1.9, unlike in z/OS 1.8, the DIAGxx PARMLIB member defaults to a
setting of VSM ALLOWUSERKEYCSA(NO) which forbids you to allocate Key 8 (or any
user key) storage in Common Storage. LOOK does this, so if VSM
ALLOWUSERKEYCSA(NO) is set in the DIAGxx member or if it is not set at all, and
it defaults (in z/OS 1.9) to that setting, then LOOK abends with a SB0A reason
code 5C. You can globally turn off this setting with a setting of VSM
ALLOWUSERKEYCSA(YES) in the DIAGxx member followed by a SET DIAG=xx operator
command. But this leaves a system vulnerability, which we discussed several
days ago. I have made a workaround, in the form of an APF-authorized TSO
command called UKEYCSA, that is packaged with File 264 as it currently appears
on the Updates page of www.cbttape.org. UKEYCSA, if authorized, will flip the
bit settings that turn User Key allocation of CSA on or off. UKEYCSA Y will
allow User Key allocation of CSA. UKEYCSA N will turn it off. Any other
parameter, or none, will tell you the current status of this setting, and will
not change it.

So if you want to use LOOK on z/OS 1.9 for a few minutes, I'd
suggest installing the UKEYCSA TSO command as an APF-authorized command, and you
can turn UKEYCSA Y on for a few minutes, use the LOOK command, and then turn it
off with UKEYCSA N.

Please make sure you get your copy of LOOK and UKEYCSA from the
Updates page of www.cbttape.org.

Wishing you all the best........

Sam G