[This message was posted by sean grady of OptionsCity <[email protected]> 
to the "FAST Protocol" discussion forum at http://fixprotocol.org/discuss/46. 
You can reply to it on-line at http://fixprotocol.org/discuss/read/3fb98b3b - 
PLEASE DO NOT REPLY BY MAIL.]

Rolf, I've download both 'DevPakOptions302.zip' and 'complex_decode.zip' from 
http://www.nyxdata.com/nysedata/default.aspx?tabid=712.

The sample data I have comes from 
ftp://[email protected]/custom/ArcaBookMulticast.

I've tried all of the files there, in particular 
OTC_A-C_compacted_20090309.cap.gz and another file beginning with 'tcpdump'. 
Which honestly makes me question what the data is, as the multicast stuff 
should be UDP (I thought, anyway).

Even looking at the hex bytes in a hex editor doesn't help me - there is a 
weird preample on the files '0xD4 0xC3 0xB2 0xA1' and I don't understand what 
the data is/how it is laid out in the files. 

I've done this before with CME messages and those are usually pretty easy to go 
through by hand - these don't seem to match up to anything I can find in the 
spec. I also am hesitant with this sample data as I don't know exactly when it 
was captured/posted so I wonder if it  could by out of sync with what the spec 
says.

> Hi Sean,
> 
> which of the decoders (exact name of .zip) have you downloaded and which
> sample data file where you getting problems with?
> 
> /Rolf
> 
> > Has anyone had any experience decoding the FAST multicast market data
> > from ArcaBook?
> >
> > I'm attempting to use the decoder they provide in the DevPak (and they
> > insist works on their discussion forums) with sample data I downloaded
> > from them, as well as some sample messages I found posted on their
> > forums but am not having much luck.
> >
> > If anyone has done this, and has any other sample data or
> > knowledge/experience to pass along I would be very grateful.
> >
> > Thanks, Sean


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