I’ve been programming REXX since the first versions on VM/CMS which replaced EXEC and EXEC2.  The “I” stands for “Intermediates”, not “Interactive”.  And yes, I concur that the “?” has always been required for an interactive trace from the birth of REXX.  I can’t say that some version somewhere didn’t do this, but I would think it would violate the language standard.


Best Regards, -Mark


From: Rick McGuire [mailto:object.rexx@gmail.com]
Sent: Wednesday, July 10, 2013 4:28 PM
To: Open Object Rexx Announcements
Subject: Re: [Oorexx-announce] Failure


No, the ? prefix has always been required for interactive debug, even on VM/CMS. 




On Wed, Jul 10, 2013 at 5:24 PM, <William_Lightner@jbhunt.com> wrote:

I'm not particularly current in the OOREXX implementation, but I spent a lot of years doing Rexx in VM/CMS.

TRACE I         -- 'I' for 'Interactive'.  Pauses after each instruction.

On some other platforms (most DOS/Windows implementations I've seen) there's also the '?' prefix, but I don't recall having it, let alone needing it in VM/CMS.  On the other hand, the last time I worked in that environment was 1996....

Does this help?

William Lightner
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