**## Operating System: Windows 10 **
## Katalon Studio Version: Version: 5.7.1
** Build: 1**
## Katalon Studio logs:!ENTRY org.eclipse.e4.ui.workbench 4 0 2018-10-01 19:21:16.697
-
!MESSAGE
!STACK 0
java.lang.NullPointerException
at com.kms.katalon.composer.testsuite.dialogs.TestCaseSelectionDialog.getAddedTestCase(TestCaseSelectionDialog.java:283)
at com.kms.katalon.composer.testsuite.dialogs.TestCaseSelectionDialog.updateTestCaseTreeEntities(TestCaseSelectionDialog.java:198)
at com.kms.katalon.composer.testsuite.dialogs.TestCaseSelectionDialog.(TestCaseSelectionDialog.java:66)
at com.kms.katalon.composer.testsuite.providers.TestCaseTableViewer.addNewItem(TestCaseTableViewer.java:355)
at com.kms.katalon.composer.testsuite.listeners.TestCaseToolItemListener.toolItemSelected(TestCaseToolItemListener.java:40)
at com.kms.katalon.composer.testsuite.listeners.TestCaseToolItemListener.widgetSelected(TestCaseToolItemListener.java:28)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:249)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4418)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1079)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4236)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3824)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:693)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:610)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
at com.kms.katalon.core.application.Application.internalRunGUI(Application.java:115)
at com.kms.katalon.core.application.Application.runGUI(Application.java:100)
at com.kms.katalon.core.application.Application.start(Application.java:60)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)
at org.eclipse.equinox.launcher.Main.run(Main.java:1519)
## Environment (for Web testing) - Chrome Version 69.0.3497.100 (Official Build) (64-bit)
## Steps to reproduce
1. We have around 500 test cases added in Katalon.
2. We try to add all those test cases in a Test Suite.
3. The Test Suite dialog box hangs.
## Expected Behavior
**Tests should be added to the suite without any issue. **
## Actual Behavior
The Test Suite dialog box hangs.
**## Screenshots / Videos: **(please attach screenshots or videos if necessary to reproduce the issue)
I have already posted this issue earlier, but no response.
