Problem with HL7 Message Framing

[Richard Pugmire]

Hi all,

I have stumbled across a problem which I cannot seem to get to the
bottom of. When setting up a Business Operation with a basic TCP or
HTTP adapter and setting Framing to “None” the messages still get
wrapped by an MLLP envelope.

I have done a bit of a digging and made a class to override the class
method ‘SendMessage’ from EnsLib.HL7.Operation.HTTPOperation and found
the following call:

Set tSC=..OutputFramedToIOStream
(tMetaIOStream,pMsgOut,..Separators,pExpectedSequenceNumber,
1,..IOLogEntry) Quit:$$$ISERR(tSC) tSC

OutputFramedToIOStream has a 7th option which controls framing and by
default is set to 1, but if I set this to 0 then I work around my
problem and framing isn’t applied, so the problem must exist somewhere
within this method (or deeper still) when handling the user specified
value of ‘None’.

Although I have a work around any help getting to the bottom of this
would be appreciated.

Thanks

Richard Pugmire
Gateshead Health NHS Foundation Trust

[James MacKeith]

Hi Richard

Thanks for your post. I am afraid this is an error that will be
corrected in the latest release. In the interim one needs to make the
Framing setting blank.

Best wishes

James

On Nov 10, 10:22 am, Richard Pugmire <richard.pugm...@ghnt.nhs.uk>
wrote:

[Ted Peck]

You've found a bug that's recently been reported and fixed internally.
There is another workaround you can use, which is to set Framing="" (empty
string) instead of "None".

The change to fix it is filed under TAP907. It is not in any released build
yet.

If you want to fix it properly yourself in the meantime, the change is very
simple: add this case

"none":"x",

at the top of the Case statement in EnsLib.HL7.Parser.ApplyFraming()

Regards,
Ted Peck

----- Original Message -----
From: "Richard Pugmire" <richard...@ghnt.nhs.uk>
To: "InterSystems: Ensemble in Healthcare"
<Ensemble-in...@googlegroups.com>
Sent: Tuesday, November 10, 2009 10:22 AM
Subject: [InterSystems-EnsHlth] Problem with HL7 Message Framing


> Hi all,
>
> I have stumbled across a problem which I cannot seem to get to the
> bottom of. When setting up a Business Operation with a basic TCP or

> HTTP adapter and setting Framing to �None� the messages still get

> wrapped by an MLLP envelope.
>
> I have done a bit of a digging and made a class to override the class

> method �SendMessage� from EnsLib.HL7.Operation.HTTPOperation and found

> the following call:
>
> Set tSC=..OutputFramedToIOStream
> (tMetaIOStream,pMsgOut,..Separators,pExpectedSequenceNumber,
> 1,..IOLogEntry) Quit:$$$ISERR(tSC) tSC
>
> OutputFramedToIOStream has a 7th option which controls framing and by
> default is set to 1, but if I set this to 0 then I work around my

> problem and framing isn�t applied, so the problem must exist somewhere

> within this method (or deeper still) when handling the user specified

> value of �None�.

>
> Although I have a work around any help getting to the bottom of this
> would be appreciated.
>
> Thanks
>
> Richard Pugmire
> Gateshead Health NHS Foundation Trust
>

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