Re: Weird problem a customer is having with a file (James H H Lampert)

I'm here, but I don't have an answer to the problem.

Can you send me a copy of the file?  Maybe just the record that gets the
error, with any sensitive info redacted.

--Dave

James H H Lampert wrote:
> George Lemen <[email protected]> wrote:
>> You may have encountered a known problem . . . where if
>> a physical file created by SQL has a logical  
>> view/file created over it, something like the "last use" 
>> date gets corrupted and the object ends up (eventually)
>> being damaged.
> . . .
>>  Don't know if that is what you are looking at, . . . .
> 
> Well, I've also got some people at IBM looking at the 
> problem file, and as it turns out, they could tell right 
> away that it didn't come from SQL. When I asked the 
> customer how it was created, I found out it's an output 
> file from Query. And I don't think it ever had any 
> logicals defined over it.
> 
> Just about the only things I know about it are:
> 
> 1. There's a null-capable date field in it,
> 
> 2. Reading a record with that field nulled-out causes a 
> data mapping error,
> 
> 3. The record with the nulled-out field still does make it 
> into the low-level input buffer, BUT the null-map for the 
> record has a 2, instead of a 1, for the nulled-out field,
> 
> 4. The records without nulled-out fields can be updated, 
> and new records can be added, but any attempt to null-out 
> the field in a new or updated record gets ignored, and
> 
> 5. The record with the nulled-out field rejects all 
> attempts to update it, regardless of whether I plug a 
> valid date into the field, or I plug either a 1 or a 2 
> into the field's position in the null-map, throwing a 
> data-mapping error every time.
> 
> I haven't a clue what could be causing the problem, but 
> I'm convinced that the "2" in the null-map is a key clue.
> 
> Leif Svalgaard, Gene Gaunt, Dave McKenzie, any other MI 
> gurus, WHERE ARE YOU?
> 
> --
> JHHL
>



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