[Quickfix-developers] bad checksum on repeating groups

[Brian M. <bri...@ro...>]

We are get a quote acknowledgement (35=3Db) message and quickfix appears
to be calculating the checksum incorrectly.  It appears that the
checksum is always the number of quote entries - 1 off from what the
checksum should be.  Here's an example message:

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8=3DFIX.4.29=3D044935=3Db34=3D54349=3DAFIX20256=3DRNS52=3D20050908-16:44:=
37117=3DQU_VLO2
97=3D0300=3D0336=3DW_MAIN296=3D1302=3D1311=3DVLO304=3D4295=3D4299=3DQU_16=
25819#VLO#2005#9#
80#155=3DVLO167=3DOPT200=3D200509201=3D1202=3D80368=3D09006=3D0299=3DQU_1=
625832#VLO#2005
#9#85#155=3DVLO167=3DOPT200=3D200509201=3D1202=3D85368=3D09006=3D0299=3DQ=
U_1674687#VLO#2
005#9#90#155=3DVLO167=3DOPT200=3D200509201=3D1202=3D90368=3D09006=3D0299=3D=
QU_1838502#VL
O#2005#9#95#155=3DVLO167=3DOPT200=3D200509201=3D1202=3D95368=3D09006=3D01=
0=3D101

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Here, 4 quote entries are being acked however the quickfix event log
shows the computed check sum to be 98 instead of 101.  One thing unusual
here is the user defined 9006 tag in each of the quote entries.  In
stepping through the debugger, I noticed those tags checksums being
computed outside of the field group. =20

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Any help would be appreciated.

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Thanks,

Brian McAndrews

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