RE: QTEMP (and QRPLOBJ)

["Simon Coulter" <shc@xxxxxxxxxxxxxxxxx>]

Hello Brad,

I doubt very much that is the problem.  This message usually results from the 
following 
situations:

        Job gets resolved pointer to object
        Object is destroyed
        Job uses resolved pointer to access object
or
        Job gets resolved pointer to object
        Job uses resolved pointer to set pointer to associated space
        Object is destroyed
        Job uses associated space pointer

This used to be a common situation before QRPLOBJ.  When a program was compiled 
you used to 
have to delete or move the existing program.  Deleting it while it was in use 
would result in 
this message (or a similar one).  Moving it was fine.  

The whole point of QRPLOBJ and the REPLACE(*YES) parameter is to avoid this 
situation.  The 
compiler moves the existing program to QRPLOBJ and replaces it with the new 
version.  Any job 
using the old version continues to do so until the program is CALLed again 
(provided it has 
been deactivated).  That is because the job has a resolved pointer to the 
program and moving 
an object doesn't change its virtual address -- doesn't move it physically 
either, just 
reassigns its context.

Clearing a library is supposed to only destroy external objects.

This problem is happening in the ILE runtime support for the CHAIN operation 
and as I have 
previously stated here MCH messages in IBM code generally indicate an APARable 
situation.  
Some object the CHAIN expects has been destroyed.  Possibly due to LR being off.

MCH messages are notorious for their brevity so I doubt the second-level text 
names the 
missing object but there should be a VLOG entry for the error that IBM can use 
to further 
investigate.

Regards,
Simon Coulter.

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//--- forwarded letter -------------------------------------------------------
> X-Mailer: Internet Mail Service (5.5.2448.0)
> Date: Mon, 07 Jun 99 15:21:50 -0500
> From: "Stone, Brad V (TC)" <bvstone@taylorcorp.com>
> To: "'MIDRANGE-L@midrange.com'" <MIDRANGE-L@midrange.com>
> Reply-To: MIDRANGE-L@midrange.com
> Subject: RE: QTEMP

> 
> These are most likley objects that have been replaced.  IBM stores them in
> QRPLOBJ library.  If you replace an object that a job still has in memory
> and the job tries to call it again, you'll get the error you describe.
> 
> Bradley V. Stone
> Taylor Corporation - OASIS Programmer/Analyst 
> bvstone@taylorcorp.com
 

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