diff --git a/process-analyzer-demo/src_hd/com/axonivy/utils/process/analyzer/demo/component/AnalyzerSelection/AnalyzerSelectionProcess.p.json b/process-analyzer-demo/src_hd/com/axonivy/utils/process/analyzer/demo/component/AnalyzerSelection/AnalyzerSelectionProcess.p.json
index 686f5f5..50a7ad8 100644
--- a/process-analyzer-demo/src_hd/com/axonivy/utils/process/analyzer/demo/component/AnalyzerSelection/AnalyzerSelectionProcess.p.json
+++ b/process-analyzer-demo/src_hd/com/axonivy/utils/process/analyzer/demo/component/AnalyzerSelection/AnalyzerSelectionProcess.p.json
@@ -114,7 +114,8 @@
             "in.processAnalyzerBean.selectedAnalyzer.tasks = in.processAnalyzerBean.getDetectedTask();",
             "in.processAnalyzerBean.selectedAnalyzer.totalDuration = in.processAnalyzerBean.getDetectedTaskCalculate();"
           ]
-        }
+        },
+        "sudo" : true
       },
       "visual" : {
         "at" : { "x" : 288, "y" : 360 }
diff --git a/process-analyzer-test/src_test/com/axonivy/utils/process/analyzer/test/FlowExampleErrorTest.java b/process-analyzer-test/src_test/com/axonivy/utils/process/analyzer/test/FlowExampleErrorTest.java
index d266b01..fc2495e 100644
--- a/process-analyzer-test/src_test/com/axonivy/utils/process/analyzer/test/FlowExampleErrorTest.java
+++ b/process-analyzer-test/src_test/com/axonivy/utils/process/analyzer/test/FlowExampleErrorTest.java
@@ -42,7 +42,7 @@ void shouldThrowExceptionWhenFindTasksOnPathAtStartWithFlowNameNull() {
 			processAnalyzer.findTasksOnPath(start, null, null);
 		});
 
-		String expectedMessage = "Not found path after element alter1-18DD16F8AA39F5DE-f7";
+		String expectedMessage = "Not found path after element: \"alter1-18DD16F8AA39F5DE-f7\"";
 		String actualMessage = exception.getMessage();
 
 		assertEquals(expectedMessage, actualMessage);
diff --git a/process-analyzer-test/src_test/com/axonivy/utils/process/analyzer/test/FlowSubProcessCaseTest.java b/process-analyzer-test/src_test/com/axonivy/utils/process/analyzer/test/FlowSubProcessCaseTest.java
index d6fedca..cb66990 100644
--- a/process-analyzer-test/src_test/com/axonivy/utils/process/analyzer/test/FlowSubProcessCaseTest.java
+++ b/process-analyzer-test/src_test/com/axonivy/utils/process/analyzer/test/FlowSubProcessCaseTest.java
@@ -1,8 +1,9 @@
 package com.axonivy.utils.process.analyzer.test;
 
 import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
-import java.util.List;
+import java.time.Duration;
 
 import org.assertj.core.util.Arrays;
 import org.junit.jupiter.api.BeforeEach;
@@ -15,7 +16,6 @@
 import ch.ivyteam.ivy.bpm.engine.client.element.BpmProcess;
 import ch.ivyteam.ivy.bpm.exec.client.IvyProcessTest;
 import ch.ivyteam.ivy.workflow.ICase;
-import ch.ivyteam.ivy.workflow.ITask;
 
 @IvyProcessTest
 public class FlowSubProcessCaseTest extends FlowExampleTest {
@@ -27,11 +27,9 @@ public void setupForEach() {
 	}
 
 	@Test
-	void shouldshouldFindAllTasksAtStart3(BpmClient bpmClient) throws Exception {
+	void shouldFindAllTasksAtStart3(BpmClient bpmClient) throws Exception {
 		ExecutionResult result = bpmClient.start().process(FLOW_SUB_PROCESS.elementName("start3")).execute();
 		ICase icase = result.workflow().activeCase();
-
-		List<ITask> parallelTasks = result.workflow().activeTasks();
 		
 		var detectedTasks = processAnalyzer.findAllTasks(icase, null);
 
@@ -41,16 +39,24 @@ void shouldshouldFindAllTasksAtStart3(BpmClient bpmClient) throws Exception {
 	}
 	
 	@Test
-	void shouldshouldFindAllTasksAtStart(BpmClient bpmClient) throws Exception {
+	void shouldFindAllTasksAtStart(BpmClient bpmClient) throws Exception {
 		ExecutionResult result = bpmClient.start().process(FLOW_SUB_PROCESS.elementName("start")).execute();
 		ICase icase = result.workflow().activeCase();
 
-		List<ITask> parallelTasks = result.workflow().activeTasks();
-		
 		var detectedTasks = processAnalyzer.findAllTasks(icase, null);
 
 		var expected = Arrays.array("Task A", "Task B");
 		var taskNames = getTaskNames(detectedTasks);
 		assertArrayEquals(expected, taskNames);
 	}
+	
+	@Test
+	void shouldCalculateWorstCaseDuration(BpmClient bpmClient) throws Exception {
+		ExecutionResult result = bpmClient.start().process(FLOW_SUB_PROCESS.elementName("start")).execute();
+		ICase icase = result.workflow().activeCase();
+		
+		var total = processAnalyzer.calculateWorstCaseDuration(icase, UseCase.BIGPROJECT);
+		
+		assertEquals(Duration.ofHours(9), total);
+	}
 }
diff --git a/process-analyzer/src/com/axonivy/utils/process/analyzer/internal/PathFinder.java b/process-analyzer/src/com/axonivy/utils/process/analyzer/internal/PathFinder.java
index 3aaebc1..344fe5f 100644
--- a/process-analyzer/src/com/axonivy/utils/process/analyzer/internal/PathFinder.java
+++ b/process-analyzer/src/com/axonivy/utils/process/analyzer/internal/PathFinder.java
@@ -433,7 +433,8 @@ private Map<SequenceFlow, List<AnalysisPath>> findAnalysisPathForNextNode(Proces
 		
 		List<SequenceFlow> outs = getSequenceFlows((NodeElement) from.getElement(), flowName, findType);
 		if (from.getElement() instanceof Alternative && outs.isEmpty()) {
-			throw new Exception("Not found path after element " + processGraph.getAlternativeNameId(from.getElement()));
+			String mgs = String.format("Not found path after element: \"%s\"", processGraph.getAlternativeNameId(from.getElement()));
+			throw new Exception(mgs);
 		}
 
 		Map<SequenceFlow, List<AnalysisPath>> pathOptions = new LinkedHashMap<>();
diff --git a/process-analyzer/src/com/axonivy/utils/process/analyzer/internal/ProcessAnalyzer.java b/process-analyzer/src/com/axonivy/utils/process/analyzer/internal/ProcessAnalyzer.java
index 3854894..afeaac8 100644
--- a/process-analyzer/src/com/axonivy/utils/process/analyzer/internal/ProcessAnalyzer.java
+++ b/process-analyzer/src/com/axonivy/utils/process/analyzer/internal/ProcessAnalyzer.java
@@ -4,12 +4,12 @@
 import static java.util.Optional.ofNullable;
 
 import java.time.Duration;
+import java.util.ArrayList;
 import java.util.Date;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
-import java.util.Optional;
 import java.util.stream.Stream;
 
 import org.apache.commons.lang3.ArrayUtils;
@@ -207,7 +207,14 @@ private Map<ProcessElement, Duration> getStartElementsWithSpentDuration(ICase ic
 
 	private List<BaseElement> getStartElements(ICase icase) {
 		List<ITask> tasks = getCaseITasks(icase);
-		List<BaseElement> elements = tasks.stream().map(task -> TaskHelper.getBaseElementOf(task)).toList();
+		List<BaseElement> elements = new ArrayList<>();
+		for (ITask task : tasks) {
+			BaseElement element = TaskHelper.getBaseElementOf(task);
+			if (isTaskInCallableSub(element)) {
+				element = getOriginalCallerElement(task);
+			}			
+			elements.add(element);
+		}
 
 		return elements;
 	}