[This message was posted by Hanno Klein of Deutsche Börse Systems
<[email protected]> to the "4.4 Changes" discussion forum at
http://fixprotocol.org/discuss/17. You can reply to it on-line at
http://fixprotocol.org/discuss/read/a748faf0 - PLEASE DO NOT REPLY BY MAIL.]
I can only guess. 751 is optional and defaults to 0 if absent, meaning that
everything is ok, no actual rejection. However, the default has an impact when
rejecting a TCR.
Setting 939 to 1=Reject implicitly forces you to send a reject reason with 751
as you would be sending 0=Successful if you omitted 751 which does not make
sense.
Newer fields have been designed to be more generic, i.e. the response comes
with XXXStatus and XXXResult fields. XXXStatus responds on a high level (e.g.
accepted, rejected) whereas XXXResult gives you details. 0=Successful is
typically the only detail for XXXStatus being "accepted". Other values are
usually only for the negative case, i.e. XXXStatus being rejected. However, it
is more generic to use XXXResult than XXXRejectReason as it allows you to model
flavors. It also gets philosophical when you start to debate whether not
finding an entity should be a rejection reason or not. The request is perfectly
valid, it just happens to return the empty result set. This is more acceptable
for mass requests than for single entity requests (e.g. OrdRejReason=5=Unknown
order).
Existing (old) fields are left alone, leading to a lack of symmetry across
messages. That is part of the price to pay for using a standard, i.e. you never
again get the chance to start from a clean slate. Therefore one should not be
too harsh with FIX and see its benefits rather than its deficiencies :-)
> What is the proper use of the default value "0" (for "Successful") for tag
> 751 ("TradeReportRejectReason") in the Trade Capture Report Ack ("AR")
> message?
>
> As a related matter, if the value of the TrdRptStatus field (tag 939) is set
> to "1" ("Rejected"), is "0" a sensible value for TradeReportRejectReason?
>
> Thank you for your help.
>
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