RE: Decompile - Projecting source

-----Original Message-----
From: rpg400-l-bounces+cwilt=meaa.mea.com@xxxxxxxxxxxx 
[mailto:rpg400-l-bounces+cwilt=meaa.mea.com@xxxxxxxxxxxx] On 
Behalf Of Alan Campin
Sent: Friday, September 01, 2006 3:46 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: Re: Decompile - Projecting source

If compile the source with no debug information and then remove
observability, there is no way that it can be de-compiled except by
using a de-compiler which they would have to be buy. I am not 
even sure
you buy a de-compiler for RISC ILE program. 

If you remove observability, you do not even have the w-code. Nothing
but the machine code. 

CHGPGM PGM(ALANC/EF0001) RMVOBS(*ALL)          

Not quite.  

It used to be that way.  Prior to v5r1, that was basically true.
However, now enough "something" is left for the program to be
retranslated.

From the v5r1 Memo to Users:

"In V5R1, removing creation data does not completely remove
observability
information and, therefore, does not reduce object size as much. If
creation data has been removed from a module or program created for V5R1
and later releases, it can no longer be retrieved. However, the affected
programs or modules can be retranslated when restored to a system during
the restore operation."

"In previous releases, any program validation error
that was encountered at restore time resulted in the program being
re-created if possible (if observability existed in the program being
restored). The difference with V5R1 or later programs is that the
information needed to re-create the program remains even after
observability has been removed from the program."

HTH,

Charles Wilt
--
iSeries Systems Administrator / Developer
Mitsubishi Electric Automotive America
ph: 513-573-4343
fax: 513-398-1121