{{Quickfixn}} Cracking FIXT1.1 admin messages

[Campbell Wild]

I can't seem to work out how to crack FIXT1.1 admin messages (heartbeats, logons, logouts, rejects etc)

Application level messages work fine.  However, unless I have the following code in fromAdmin

if (!sessionID.IsFIXT) {
                Crack(oMessage, sessionID);
}

Then I get the following exception:

QuickFix.UnsupportedMessageType occurred
  HResult=-2146233088
  Message=Exception of type 'QuickFix.UnsupportedMessageType' was thrown.
  Source=QuickFix
  StackTrace:
       at QuickFix.MessageCracker.Crack(Message message, SessionID sessionID)
  InnerException:

FIX 4.2/4.4 admin messages crack in the normal way.

Can anyone offer me any hints?

Thanks,
Campbell

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