> According to my uncertain memory, there was a change in PDS 
> directory code between zOS 1.12 and zOS 1.13.  This caused PDS 
> directory errors under certain conditions, resulting in corrupted or
> lost pointers.  If the affected member was not referenced, the 
> problem remained hidden.  Unfortunately for me, I usually found out 
> when I compressed the PDS.  The issue was fixed in 2.1 . 
> I understood that one fix for 1.13 was to restore the old zOS 1.12 
> PDS code.  But I never saw a reference to an APAR or other 
> 'official' fix.  Does anyone remember this who could point me in the
> right direction?

IEBCOPY -  APAR OA40379

Jim Mulder   z/OS System Test   IBM Corp.  Poughkeepsie,  NY


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