>> ... can the BAKR instruction be used in z/VSE? <<
I am not Tony, but I guess my answer is as good.
Yes BAKR can be used in VSE - but not in CICS (or only in very very rare
circumstances- AND to be very exact- not in any task switching
environment (I know that I convinced one very good developer during WAVV
199?, who now is in Israel, to use it all over the place in VSE with
rought consequences)).
VSE does not set it up in given partition until it is really used so
you fill not find it unless you had at least one BAKR in your code (or
the other instruction for transfer of control that needs one which has
escaped me in the moment).
AND the other warning:
No support for the linkage stack in an abend situation for the dumping
process, if you are in a vanilla VSE system. It is flushed and empty for
the next, but not shown in dumps
Martin