See page 24 onwards for LCB usage 
https://www.cbttape.org/xephon/xephonm/mvs9806.pdf
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There is 1 message totaling 16 lines in this issue.

Topics of the day:

  1. Logon Communication Block (LCB)

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Date:    Sat, 24 May 2025 09:51:24 +0100
From:    Jonathan Scott <jonathan.scott...@gmail.com>
Subject: Re: Logon Communication Block (LCB)

I vaguely remember coming across the Logon Communication Block (LCB) as part of 
a set of customized TSO pre-logon and post-logon exits (IKJEFLD1/FLD3), used to 
communicate between them.  I'm not aware of any official predefined version.

Jonathan Scott

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