Business Process is adding control characters.

Input HL7 shows no control characters in Notepad ++

Output

Code:

Method FromCerner(pRequest As EnsLib.HL7.Message) As %Status
{
    #dim tStatus As %Status = $$$OK
    #dim eException As %Exception.AbstractException
    #dim tOBXText As %String
    #dim tItemNumberCount As %Integer = 0
    #dim tItemNumberProcessed As %Integer = 0
    #dim tTotalCostSegment As %Integer = 0
    #dim tOrderType As %String
    #dim i As %Interger = 0
    #dim tOBXKey As %Integer = 0
    #dim tOBXTextChanged As %String
       ////
       Set pOutput = pRequest.%ConstructClone(1) // moved here because %ConstructClone() need only be done at the message object level.
       //$$$LOGINFO(pOutput_" ---- pOutput to see if clone is created****")
    // Set the message
    Set tMessageType = pOutput.GetValueAt("MSH:9.1")
    //$$$LOGINFO(tMessageType_" --- tMessageType check that pOutput works") ORM found
    //
    Try {
          // Message Subtype
          Set tMessageSubType = pOutput.GetValueAt("ORCgrp(1).ORC:1")
          //$$$LOGINFO(tMessageSubType_"----- tMessageSubType - = NW -- ") works
          // Check if OBR:19 contains "Implant Usage (PSAS)" OR "Issued in Clinic (PSAS)"
          Set tOrderType = pOutput.GetValueAt("ORCgrp(1).OBRuniongrp.OBRunion.OBR:19(1).1")
          //$$$LOGINFO(tOrderType_" -- pOutput ???? -- tOrderType Ordder Type = Implant Usage (PSAS) for first interation")
       If ((tOrderType["Implant Usage (PSAS)") || (tOrderType["Issued in Clinic (PSAS)")) {
          // First loop: Count occurrences of "Item Number:"
          Set i = 1
          Set tItemNumberCount = 0
          //
       While (pOutput.GetValueAt("ORCgrp(1).OBRuniongrp.OBXgrp("_i_").OBX")'="") {
            // Find the number of segments that are Item Number
            Set tOBXText = pOutput.GetValueAt("ORCgrp(1).OBRuniongrp.OBXgrp("_i_").OBX:5", .tStatus)
            //$$$LOGINFO(tOBXText_"**** "_i_" ---- tOBXText OBX 5 text and i value") // working
            //
                If (tOBXText [ "Item Number:") {
                Set tItemNumberCount = tItemNumberCount + 1
                     //$$$LOGINFO(tItemNumberCount_" ----- tItemNumberCount")
                                                                    }
            Set i = i + 1
        }    //end While loop
        //
        // Second loop: Modify OBX segments to remove "REASON FOR REQUEST"
        //$$$LOGINFO("SECOND LOOP for remove")
        //$$$LOGINFO(tItemNumberCount_" ----- tItemNumberCount")
        Set i = 1
        Set tItemNumberProcessed = 0
           While (pOutput.GetValueAt("ORCgrp(1).OBRuniongrp.OBXgrp("_i_").OBX")'="") {
               Set tOBXText = pOutput.GetValueAt("ORCgrp(1).OBRuniongrp.OBXgrp("_i_").OBX:5", .tStatus) // using pOutput instead of pRequest
               //$$$LOGINFO(tOBXText_" ---- tOBXText get OBX 5 text")
            If (tOBXText [ "Item Number:") {
               Set tItemNumberProcessed = tItemNumberProcessed + 1
                                           }
            If (tItemNumberCount >= 1) && (tOBXText [ "REASON FOR REQUEST:") {
                Set tOBXText=$p(tOBXText,":",2,5) /// OBX 5 text parsed to replace in OBX 5 later
                // Start replacement process
                Do pOutput.SetValueAt(tOBXText,"ORCgrp(1).OBRuniongrp.OBXgrp("_i_").OBX:5","set") /// Required
                //$$$LOGINFO(tOBXText_" ---- OBX 5 parsed to be saved in new OBX 5")
                //Set tOBXTextChanged = pOutput.GetValueAt("ORCgrp(1).OBRuniongrp.OBXgrp("_i_").OBX:5") // NOT required
                //$$$LOGINFO(i_" **** "_tOBXTextChanged_" --- i --- tOBXTextChanged, Is OBX 5 changed???")
                Set z = i
                
             //OBX|1|TX|2000.02^REASON FOR REQUEST^AS4|19||
             //Do pOutput.SetValueAt(tOBXText_"~~","ORCgrp(1).OBRuniongrp.OBXgrp("_i_").OBX:5","set") //
                set segcnt = 0
             //
            If ((tOBXText[ "Total Cost:")) {
                Set tSegmentOBX = ##class(EnsLib.HL7.Segment).%New()
                Set tSegmentOBX.SegType = "2.3:OBX"
                Set tSC = tSegmentOBX.SetValueAt("OBX", 0, "set")
                Set tSC = tSegmentOBX.SetValueAt("1|TX|2000.02^REASON FOR REQUEST^AS4", 1, "set")
             //|1|TX|2000.02^REASON FOR REQUEST^AS4
                set count = 0
                set z = i +5
            If (z '= (segcnt -4)) {
                Set tSC = pOutput.InsertSegmentAt(tSegmentOBX, z)
                                 }
                set segcnt = pOutput.SegCount
                set count = segcnt - 2
             //$$$LOGINFO(tOBXText_" *** "_z_" "_count_"***"_segcnt_" z ----count --- segcnt")
                Set tRemoveText = pOutput.GetValueAt("ORCgrp(1).OBRuniongrp.OBXgrp("_i_").OBX:5", .tStatus)
             //$$$LOGINFO(i_" **** "_tRemoveText_"***"_z_"***"_count_"***"_segcnt_" --- i --- tRemoveText_ --- z ---- count --- segcount")
            If (segcnt - z = 3) {
             //$$$LOGINFO(i_" **** "_tRemoveText_"***"_z_"***"_count_"***"_segcnt_" **** segcnt - 3 *** --- i --- tRemoveText_ --- z ---- count --- segcount")
                set tSC = pOutput.RemoveSegmentAt(z)
                                }
             //
             elseif (tItemNumberCount = 1) && (tOBXText [ "REASON FOR REQUEST:")
                {
                Set tOBXText=$p(tOBXText,":",2,5) /// OBX 5 text parsed to replace in OBX 5 later
                // Start replacement process
                Do pOutput.SetValueAt(tOBXText,"ORCgrp(1).OBRuniongrp.OBXgrp("_i_").OBX:5","set") /// Required
                //$$$LOGINFO(tOBXText_" ---- OBX 5 parsed to be saved in new OBX 5")
                //Set tOBXTextChanged = pOutput.GetValueAt("ORCgrp(1).OBRuniongrp.OBXgrp("_i_").OBX:5") // NOT required
                //$$$LOGINFO(i_" **** "_tOBXTextChanged_" --- i --- tOBXTextChanged, Is OBX 5 changed???")
                }
             }
            }
            Set i = i + 1
        }
    }
            //
        // Process ORM messages with subtype RE
        If tMessageSubType = "RE" {
            Set tResultType = pRequest.GetValueAt("ORCgrp(1).OBRuniongrp.OBXgrp(1).OBX:11")
            If tResultType = "D" {
                $$$ThrowOnError(..ProcessPurgeDocumentToVista(pRequest))
            } Else {
                $$$ThrowOnError(..ProcessNewDocumentToVista(pRequest))
            }
        }
        ElseIf (tMessageType="ORM") {
            //$$$ThrowOnError(..SendRequestAsync(..VistaTarget, pRequest, 1, "OutputCernerToVistaORM"))
            $$$ThrowOnError(..SendRequestAsync(..VistaTarget, pOutput, 1, "OutputCernerToVistaORM")) // Must use the object for the clone
        }
        ElseIf (tMessageType="ORR") || (tMessageType="ACK") {
            $$$ThrowOnError(..SendRequestAsync(..VistaTarget, pRequest, 1, "OutputCernerToVistaORR"))
        }
        Else {
            $$$ThrowOnError($$$ERROR($$$GeneralError, "Error: unable to process message from Cerner. Message type " _ tMessageType _ " received."))
        }
    }
    Catch eException {
        Set tStatus = eException.AsStatus()
        Set tStatus = $$$ADDSC(tStatus, ..CreateAndSendAlert(eException.DisplayString(), pRequest))
    }
    Quit tStatus
} /// /////////////////////////////////////////
/// ////////////////////////////////////////