QuickFixn Outgoing Connection

Question

I was hoping someone can shed some light on how the Quickfixn engine handles outgoing FIX messages... I have an outgoing connection set up, and I'm getting heartbeats. When I generate an outgoing message however, it gets rejected because it says that tag 58 is invalid for this message type... (35=AE) ... Normally, if this was an inbound connection, I could just modify the Data Dictionary and everything would be fine... but seeing as how this is an outgoing connection, plus I have my UseDataDictionary property set to 'N' ... what does the quickfix engine use to validate the outgoing message? Can something be changed to allow the engine to pass the message ? Or is the only resolution not to include this tag in my outgoing message?

Any help on this matter would be greatly appreciated.

Edit-

The message is getting rejected by the quickfix engine. The message that I'm constructing and the respective reject message are:

8=FIX.4.4 9=400 35=AE 34=38 49=XXX 52=20130528-23:11:04.040 56=YYY 31=1.3022 32=1000000.00 39=0 55=EUR/USD 58=ABCD 60=20130528-22:34:52.000 64=20130531 75=20130529 570=N 571=ABCD 5495=0 5971=1302200.00 552=1 54=2 37=ABCD 453=3 448=LP1-DBAB 447=D 452=17 448=XXX 447=D 452=1 448=XXX 447=D 452=19 15=EUR 120=USD 10=082

8=FIX.4.4 9=130 35=3 34=38 49=YYY 52=20130528-23:11:04.283 56=XXX 45=38 58=Tag not defined for this message type 371=58 372=AE 373=2 10=033

I've seen incoming messages get rejected by the quickfix engine because the data dictionary didn't have the correct specs for the message... I thought this might be the same thing but the outgoing connection doesn't seem to use the data dictionary.

Answer 1

Your FIX library does not reject a message. The message is sent to the counter-party instead, which then rejects your message as invalid upon receiving and validating it. And the reason for that is because tag 58, if present, must be a part of “NoSides repeating group (tag 552), which in your case it is not, making the message ill-formed. What you have to do is send a "logically" correct message. I recommend you refer to the appropriate FIX protocol specification for a reference on how to construct a correct message.

Answer 2

Vlad's answer is correct, but I want to alert you to one other danger in your question.

I have my UseDataDictionary property set to 'N'

I am 90% sure you don't want to do this. Whatever you think you're gaining by using =N is probably based on a misunderstanding of something.

Without a DD, you can't read messages with repeating groups, because the engine won't know what fields go in what group.

In practice, every venue uses repeating groups. Therefore, you'll need to set UseDataDictionary=Y and you need to specify an xml file with DataDictionary=<file>.

The only reason we allow =N in QF/n is to be consistent with QF/C++ and QF/j.