{{Quickfixn}} How to prevent rejection of message missing an *optional* field.

[Mike Gatny]

FYI, the error message comes straight from the FIX specification.
See tag 380 for reference:
http://www.fixtradingcommunity.org/FIXimate/FIXimate3.0/en/FIX.5.0SP2/tag380.html

--
Mike Gatny
Connamara Systems, LLC


On Mon, Jan 13, 2014 at 6:21 PM, Manuel Lopez <lopez.post at gmail.com> wrote:

> Grant,
>
> Thanks, you are right, I figured it out soon after.  It's the error
> message that is a little confusing there--I can see the logic of it
> but it's only that a non-existent tag has been accessed, not that the data
> dictionary or the spec (or any one) requires it to be in the message.
>
> Manuel
>
>
>
>>  DO NOT set UseDataDictionary to "N" !!!   It won't fix your problem, and
>> it'll break any repeating groups also.
>>
>> The engine is operating correctly.  The problem is your code.  I'm
>> guessing
>> you're calling "message.LastPx" (or "GetField(31)" or whatever) without
>> actually checking that LastPx is in the message.
>>
>> If you attempt to extract a field and it's not set, the engine assumes
>> that, since you expected the field to be there, it was conditionally
>> required.  (Not *always* required, but conditionally required, which means
>> it's only required in certain circumstances that the engine can't know.)
>>
>> That is today, the engine is trusting that *your* code is correct, and
>> that
>> the other party has violated *your* requirement.
>>
>> It appears that you want 31 to be completely optional.  In that case, you
>> must check to see if it's present before you extract it, e.g.
>>
>>     if(message.IsSetLastPx)
>>         lastPx = message.LastPx.Value;  // or whatever
>>
>> (Pardon me if I didn't get the function names exactly right.)
>>
>>
>>
>> On Fri, Jan 10, 2014 at 6:21 PM, Manuel Lopez <lopez.post at gmail.com>
>> wrote:
>>
>> > I think I'll set UseDataDictionary to "N."
>> >
>> >
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>> >
>>
>>
>> --
>> Grant Birchmeier
>> *Connamara Systems, LLC*
>> *Made-To-Measure Trading Solutions.*
>>
>> Exactly what you need. No more. No less.
>> http://connamara.com
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