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Hi Hanno Klein,

Thanks for your reply.
Can you please guide us to find in FIX session protocol (errata) severe 
scenarios mentioned where we can terminate the session.

Thanking again.

> Seems a little harsh to disconnect the session as soon as a single
> message is received with an invalid tag.
> 
> Application level messages such as OrderStatusRequest or NewOrderSingle
> will not do you any harm. The rejection allows the submitter to take
> action and "try again", obviously after he has changed something.
> 
> A rogue application firing invalid messages at you is a different story.
> 
> Have a look at the FIX Session protocol where severe scenarios are
> described when you should terminate the session. An invalid tag is a
> simple error.
> 
> > Dear All,
> >
> > As a SELL side, we are issuing session level reject message (35 =
> > 3) if tag not defined for message type is sent by the BUY side.
> > (We are FIX
> > 4.2. compliant)
> >
> > After session level rejection we are disconnecting the session also.
> >
> > Can we follow session disconnection after session level rejection or
> > allow all other incoming mesage request without disconnecting the
> > session?
> >
> > Thanks in advance.


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