Those are good points and something that I thought about.  It wouldn't be 
useful if it didn't work in all environments like ISPF, IPCS, OMVS, etc.  

Which means, I think, that one would have to somehow start the exec with the 
equivalent of TRACE ?I and be able to monitor and control the execution.  And 
at the same time be able to execute immediate commands, say to display or 
change variables.  

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of 
Shmuel Metz (Seymour J.)
Sent: Thursday, January 04, 2007 2:13 PM
To: [email protected]
Subject: Re: How to write a full-screen Rexx debugger?


However, if you want something more than a toy then you'd need to do
three things that would make it more difficult:

 1. Monitor variables against specific values.

 2. Run at near full speed in between breakpoints, watchpoints
    and such.

 3. Handle more than just TSO line-mode applications. What do you do
    if the REXX code you're debugging itself uses ISPF services? What
    if it's not in a TSO environment at all?

at http://bama.ua.edu/archives/ibm-main.html

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