What is a defective PTF in AS/400

20 pts.
Tags:
AS/400
iSeries
I can't find the answer from the cover letter. It would be great if someone explains for novice.
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It’s a PTF that when applied may work for a vast majority of it’s customers but not you. There may be a unique situation at your installation that the PTF will not resolve. This makes it defective. This is another reason to apply them permanently like Splat mentions below.

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I believe that last sentence should read “This is another reason not to apply them permanently […]”

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  • Splat
    In short, it's what the name implies - a PTF that does not do what it was intended to do or has detrimental effects.

    The possibility of defective PTFs is a reason I tend to avoid applying PTFs permanently until it's necessary.  It's also why I prefer to be a bit . . . deliberate (it has a nicer sound than dilatory) about applying PTFs.  It's not often you have a situation where a lack of the most recent PTFs is detrimental.
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  • TheRealRaven
    PTFs cannot possibly be tested by IBM (or any vendor) in every hardware and software combination used by customers. Not to mention, bugs might slip even into a PTF. Every once in a while, a new PTF will be found to cause trouble for some customers. Once that's determined, IBM will list it as 'Defective'.

    The cover letter is part of the original, and won't change. It won't have any indication of a problem. The PTF will simply go on the 'Defective' list.

    As long as a superseding fixing PTF exists and gets applied, there should be no problem applying a defective PTF, temporary or permanent. Otherwise, the defective PTF should be removed if it's been inadvertently applied.
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