[Quickfix-developers] Bodylength calculation with a FIX44 message including a sub-group

[Bill R. Hr. <bil...@ra...>]

The following message

8=FIX.4.4!9=528!35=8!49=VTX!56=XXXXX!11=M/2691122!150=B!39=B!37=7-65551-V!19
8=O/2715468!527=1000343M000027B1!336=EBS-2!625=EBS-7!453=2!448=3112!447=D!45
2=1!802=1!523=UBSZHM12!803=3!448=18207!447=D!452=11!526=O/2715468!17=1000343
M000027B1-1V-1!636=Y!1=AU!581=1!48=CH0016440353!22=4!207=XVTX!107=EMS-CHEMIE
N!15=CHF!30=XVTX!54=1!151=0.000000!14=300!6=102.300000!32=300!31=102.300000!
381=30690.000000!29=1!58=CHF
30720.00;!75=20040922-10:00:17!118=30690.000000!119=30690.000000!64=20040927
-00:00:00!120=CHF!155=1.000000!156=M!60=20040922-00:00:00!10=103!

triggers the exception "Invalid message: Expected BodyLength=534, Recieved
BodyLength=528". Counting the length manually gives the same result, the
length is 528.

My application receives the FIX message from a internal system in a string
and validates it with QuickFIX, e.g.
    FIX::Message msg(p_content, dict);
Where p_content contains the message as a string. 



After some checking I believe that the usage a the subgroup (see following
structure out of FIX44.xml) is the cause.

 <component name="Parties">
      <group name="NoPartyIDs" required="N">
        <field name="PartyID" required="N" />
        <field name="PartyIDSource" required="N" />
        <field name="PartyRole" required="N" />
        <group name="NoPartySubIDs" required="N">
          <field name="PartySubID" required="N" />
          <field name="PartySubIDType" required="N" />
        </group>
      </group>
    </component>

The function calculateLength seems to count the length of field 802
(NoPartySubIds) twice (which results in a total length of by 6 bytes).
But I'm not sure about how to fix FieldMap::calculateLength.

Regards
Robert


PS: The message checksum doesn't compute as I changed tag 56 and replace !
mentally with \001...