diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4493296..b2f5c7e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [4.0.1] - 2024-08-09
+
+- #45: Fixed Python line 0 tracking for 2024.2 
+
 ## [4.0.0] - 2024-08-01
 
 ### Changed
diff --git a/cls/TestCoverage/Data/CodeUnit.cls b/cls/TestCoverage/Data/CodeUnit.cls
index 0ac96c3..09781d7 100644
--- a/cls/TestCoverage/Data/CodeUnit.cls
+++ b/cls/TestCoverage/Data/CodeUnit.cls
@@ -82,9 +82,9 @@ ClassMethod GetCurrentByName(pInternalName As %String, pSourceNamespace As %Stri
 			$$$ThrowOnError(tSC)
 			Set tKnownHash = tMapToResult.%GetData(1)
 			Set tMapToUnit = ..HashOpen(tKnownHash,,.tSC)
-			$$$ThrowOnError(tSC)
-			$$$ThrowOnError(..GetCurrentByName(tMapToUnit.Name_"."_tMapToUnit.Type,pSourceNamespace,.tUpdatedUnit,.pCache))
-			If (tUpdatedUnit.Hash '= tKnownHash) {
+			$$$ThrowOnError(tSC)	
+			do ..GetCurrentHash(tMapToUnit.Name, tMapToUnit.Type, .tUpdatedHash, , )
+			If (tUpdatedHash '= tKnownHash) {
 				//Clear out old data and flag the need for an update.
 				Set tNeedsUpdate = 1
 				&sql(delete from TestCoverage_Data.CodeUnitMap where ToHash = :tKnownHash)
@@ -247,7 +247,6 @@ ClassMethod GetCurrentByName(pInternalName As %String, pSourceNamespace As %Stri
 /// Fill in the LineIsPython property of .cls files 
 Method UpdatePythonLines(pName As %String, ByRef pPyCodeUnit) As %Status
 {
-	
 	Set tSC = $$$OK
 	Set tOriginalNamespace = $Namespace
 	Set tInitTLevel = $TLevel
@@ -543,8 +542,9 @@ Method UpdateComplexity() As %Status
 
 		// python methods
 		If (##class(TestCoverage.Manager).HasPython(..Name)) {
-			do ##class(TestCoverage.Data.CodeUnit).GetCurrentByName(..Name _ ".PY", , .pPyCodeUnit, ) // need the source code for the python
-			set tDocumentText = pPyCodeUnit.Lines.Serialize()
+			do ..GetCurrentHash(..Name, "PY",  ,.tPyCodeArray, ) // need the source code for the python to pass into the method complexity calculator
+			do ##class(TestCoverage.Utils).CodeArrayToList(.tPyCodeArray, .tDocumentText)
+			set tDocumentText = tDocumentText _ $listbuild("")
 			set tMethodComplexities = ..GetPythonComplexities(tDocumentText)
 		}
 
diff --git a/cls/TestCoverage/Utils/LineByLineMonitor.cls b/cls/TestCoverage/Utils/LineByLineMonitor.cls
index fe929d9..858ad7e 100644
--- a/cls/TestCoverage/Utils/LineByLineMonitor.cls
+++ b/cls/TestCoverage/Utils/LineByLineMonitor.cls
@@ -68,7 +68,7 @@ ClassMethod PyStartWithScope(pCoverageClasses As %List) [ Language = python ]
 		class_name = frame.f_globals['__name__']
 		# extracts the line number 
 		line_no = frame.f_lineno 
-		if class_name in tCoverageClasses and line_no != 1: # if this is in a covered class 
+		if class_name in tCoverageClasses and line_no > 1: # if this is in a covered class 
 			tGlob = iris.gref('^IRIS.Temp.TestCoveragePY') # python doesn't have macros -- this is $$$PyMonitorResults
 			# $$$PyMonitorResults(classname, linenumber) = the number of times that linenumber in that class was covered 
 
diff --git a/module.xml b/module.xml
index 0d230e1..5540c9e 100644
--- a/module.xml
+++ b/module.xml
@@ -2,7 +2,7 @@
 <Export generator="Cache" version="25">
 <Document name="TestCoverage.ZPM"><Module>
   <Name>TestCoverage</Name>
-  <Version>4.0.0</Version>
+  <Version>4.0.1</Version>
   <Description>Run your typical ObjectScript %UnitTest tests and see which lines of your code are executed. Includes Cobertura-style reporting for use in continuous integration tools.</Description>
   <Packaging>module</Packaging>
   <Resource Name="TestCoverage.PKG" Directory="cls" />