How to Count the Number of OBX groups in a message using objectscript alone

Dear All, 

I am currently working on a project to record ORU^R01 into a global for a particular set of tests.

I have multiple OBX repeats that need to go into a specific fields withing one row/ record on the global.

I am having trouble finding a way to either count or loop though the OBX's correctly in ObjectScript often with the counter being undefined.

I have done this this way, as I am building upon an existing class to populate this global.

The latest iteration of my obx looping code is below:

// handle repeating obx's by setting count of value    
            set segcnt = pMsg.SegCountGet()
            ///count no of obx repeats
            for segmentIndex = 1:1:segcnt{
               IF pMsg.FindSegment("OBX",segmentIndex,.sc)='"",$$$ISOK(sc) {
                    set obxcnt = obxcnt+1}
            }
            
            for obxIndex=1:1:obxcnt {
                    // Check for OBX-3.1 = "CodeA" f
                    IF GetValueAt("OBX("_obxIndex_"):3.1") = "SARS" {
                        set CovRes.Ward = "CodeA"
                        set tResultAB = $ZSTRIP(GetValueAt("OBX("_obxIndex_"):5(1)"),"<>W")
                      IF tResultAB = "Positive" {
                            set CovRes.TotalAbPositive = 1
                       }
                       elseif tResultAB = "Negative" {
                            set CovRes.TotalAbPositive = 0
                        }
                    }
                    // Check for OBX-3.1 = "CodeB" 
                    elseIF GetValueAt("OBX("_obxndex_"):3.1") = "CodeB" {
                        set tResultAB = $ZSTRIP(GetValueAt("OBX("_obxIndex_"):5(1)"),"<>W")
                        If tResultAB = "Positive" {
                            set CovRes.IgGPositive = 1
                        }
                    }

 Please could someone assist.

Regards

Stuart