HL7 2.1 Fails to parse ORU^R01 ORC segment

[jsdratm]

Error: Can't instantiate class NHapi.Model.V21.Datatype.CM
(System.NullReferenceException): Object reference not set to an instance of an object.: Segment: ORC (rep 0) Field #2

Message:

MSH|^~\&|LCS|LCA|LIS|TEST9999|199807311532||ORU^R01|3629|P|2.1
PID|2|2161348462|20809880170|1614614|20809880170^TESTPAT||19760924|M|||^^^^00000-0000|||||||86427531^^^03|SSN# HERE
ORC|NW|8642753100012^LIS|20809880170^LCS||||||19980727000000|||HAVILAND
OBR|1|8642753100012^LIS|20809880170^LCS|008342^UPPER RESPIRATORY CULTURE^L|||19980727175800||||||SS#634748641 CH14885 SRC:THROA SRC:PENI|19980727000000||||||20809880170||19980730041800||BN|F
OBX|1|ST|008342^UPPER RESPIRATORY CULTURE^L||FINALREPORT|||||N|F||| 19980729160500|BN
ORC|NW|8642753100012^LIS|20809880170^LCS||||||19980727000000|||HAVILAND
OBR|2|8642753100012^LIS|20809880170^LCS|997602^.^L|||19980727175800||||G|||19980727000000||||||20809880170||19980730041800|||F|997602|||008342
OBX|2|CE|997231^RESULT 1^L||M415|||||N|F|||19980729160500|BN
NTE|1|L|MORAXELLA (BRANHAMELLA) CATARRHALIS
NTE|2|L| HEAVY GROWTH
NTE|3|L| BETA LACTAMASE POSITIVE
OBX|3|CE|997232^RESULT 2^L||MR105|||||N|F|||19980729160500|BN
NTE|1|L|ROUTINE RESPIRATORY FLORA

[ryankelley]

@jsdratm Did you ever find a solution to get nHapi to parse your message?

[slartibartfast3000]

There's a number of validation errors on that message e.g.
Looks like the MSH segment isn't correct e.g. field separator wasn't validating, it was missing a backslash

MSH|^~&|LCS|LCA|LI...

I suspect that's just a copy and paste error in to github comment requires backslash to be escaped.

There are other fields missing, for example mandatory dates in the OBR segment and CE datatype

Ensure that's resolved first

try installing Hapi test panel and ensure hl7 is well formatted

[ryankelley]

@slartibartfast3000 Thanks for the tip, interestingly enough, the messages works fine in hapi test panel, but errors out with this same error in nHapi

[milkshakeuk]

This was fixed by #136, and is available in the latest preview v3.0.0-preview.2.

I wrote a quick test just to make sure

[Test]
public void Test()
{
    var input =
        @"MSH|^~\&|LCS|LCA|LIS|TEST9999|199807311532||ORU^R01|3629|P|2.1
PID|2|2161348462|20809880170|1614614|20809880170^TESTPAT||19760924|M|||^^^^00000-0000|||||||86427531^^^03|SSN# HERE
ORC|NW|8642753100012^LIS|20809880170^LCS||||||19980727000000|||HAVILAND
OBR|1|8642753100012^LIS|20809880170^LCS|008342^UPPER RESPIRATORY CULTURE^L|||19980727175800||||||SS#634748641 CH14885 SRC:THROA SRC:PENI|19980727000000||||||20809880170||19980730041800||BN|F
OBX|1|ST|008342^UPPER RESPIRATORY CULTURE^L||FINALREPORT|||||N|F||| 19980729160500|BN
ORC|NW|8642753100012^LIS|20809880170^LCS||||||19980727000000|||HAVILAND
OBR|2|8642753100012^LIS|20809880170^LCS|997602^.^L|||19980727175800||||G|||19980727000000||||||20809880170||19980730041800|||F|997602|||008342
OBX|2|CE|997231^RESULT 1^L||M415|||||N|F|||19980729160500|BN
NTE|1|L|MORAXELLA (BRANHAMELLA) CATARRHALIS
NTE|2|L| HEAVY GROWTH
NTE|3|L| BETA LACTAMASE POSITIVE
OBX|3|CE|997232^RESULT 2^L||MR105|||||N|F|||19980729160500|BN
NTE|1|L|ROUTINE RESPIRATORY FLORA";

    var parser = new PipeParser();
    var message = parser.Parse(input);
    var oru = (ORU_R01)message;

    var placerorder = oru.GetPATIENT_RESULT().GetORDER_OBSERVATION().ORC.PLACERORDER;
    var orc2Rep0 = ((GenericPrimitive)((Varies)placerorder.Components.GetValue(0)).Data).Value;

    Assert.AreEqual("8642753100012", orc2Rep0);
}