# org.eclipse.core.internal.dtree.ObjectNotFoundException: Tree element

**URL:** <https://forum.katalon.com/t/org-eclipse-core-internal-dtree-objectnotfoundexception-tree-element/30204>\
**Category:** Bug Report\
**Tags:** bugs-report, katalon-studio\
**Created:** [July 24, 2019, 5:23pm UTC](https://forum.katalon.com/t/org-eclipse-core-internal-dtree-objectnotfoundexception-tree-element/30204 "2019-07-24T17:23:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![staniere](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/staniere/32/17333_2.png) [@staniere](https://forum.katalon.com/u/staniere)\
**Post date:** [July 24, 2019, 5:23pm UTC](https://forum.katalon.com/t/org-eclipse-core-internal-dtree-objectnotfoundexception-tree-element/30204/1 "2019-07-24T17:23:01Z")

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hello ,  
I get this error message when launching Katalon studio.  
I initially get this message when launching katalon suite within a jenkins job.  
I suspect this problem occurred after launching several katalon commandline at the same time (these katalon are different jobs in jenkins and thus have different workspaces).

What should I do to get rid of this error ?

here is an extract of my jenkins Job :

> D:\tmp\>D:\Integration\Katalon\katalon.exe -runMode=console -reportFolder=“D:\Integration\Jenkins\workspace\ReflexReactiviteENT\ReflexFmTests\Reports” -projectPath=“D:\Integration\Jenkins\workspace\ReflexReactiviteENT\ReflexFmTests\ReflexFmTests.prj” -retry=0 -testSuitePath=“Test Suites/PROD/sReactiviteENT” -executionProfile=“default” -browserType=“Chrome” --config -proxy.option=“NO\_PROXY”  
> Katalon workspace folder is set to default location: D:\Integration\Katalon\config  
> Starting Groovy-Eclipse compiler resolver. Specified compiler level: unspecified  
> 170 2.4.7.xx-201611170128-e46 = ACTIVE
> 
> INFO: Katalon Version: 6.2.1  
> INFO: Command-line arguments: -runMode=console -reportFolder=D:\Integration\Jenkins\workspace\ReflexReactiviteENT\ReflexFmTests\Reports -projectPath=D:\Integration\Jenkins\workspace\ReflexReactiviteENT\ReflexFmTests\ReflexFmTests.prj -retry=0 -testSuitePath=Test Suites/PROD/sReactiviteENT -executionProfile=default -browserType=Chrome --config -proxy.option=NO\_PROXY  
> INFO: User working dir: D:\tmp  
> INFO: User home: C:\Windows\system32\config\systemprofile  
> INFO: Java vendor: Oracle Corporation  
> INFO: Java version: 1.8.0\_181  
> INFO: Local OS: Windows Server 2016 64bit  
> INFO: CPU load: 59%  
> INFO: Total memory: 8191 MB  
> INFO: Free memory: 4522 MB
> 
> Delete folder: bin  
> Delete folder: Libs  
> Opening project file: D:\Integration\Jenkins\workspace\ReflexReactiviteENT\ReflexFmTests\ReflexFmTests.prj  
> Parsing custom keywords in Plugins folder…  
> org.eclipse.core.internal.dtree.ObjectNotFoundException: Tree element ‘/D%%Integration%Jenkins%workspace%ReflexReactiviteCPE%ReflexFmTests%ReflexFmTests.prj/Reports/junit\_report.xml’ not found.  
> at org.eclipse.core.internal.dtree.AbstractDataTree.handleNotFound(AbstractDataTree.java:257)  
> at org.eclipse.core.internal.dtree.DeltaDataTree.copyCompleteSubtree(DeltaDataTree.java:310)  
> at org.eclipse.core.internal.dtree.DeltaDataTree.naiveCopyCompleteSubtree(DeltaDataTree.java:774)  
> at org.eclipse.core.internal.dtree.DeltaDataTree.copyCompleteSubtree(DeltaDataTree.java:314)  
> at org.eclipse.core.internal.dtree.DataTreeNode.asBackwardDelta(DataTreeNode.java:54)  
> at org.eclipse.core.internal.dtree.NoDataDeltaNode.asBackwardDelta(NoDataDeltaNode.java:60)  
> at org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:48)  
> at org.eclipse.core.internal.dtree.DeltaDataTree.asBackwardDelta(DeltaDataTree.java:88)  
> at org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:832)  
> at org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:831)  
> at org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:831)  
> at org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:808)  
> at org.eclipse.core.internal.watson.ElementTree.immutable(ElementTree.java:519)  
> at org.eclipse.core.internal.events.ResourceDeltaFactory.computeDelta(ResourceDeltaFactory.java:43)  
> at org.eclipse.core.internal.events.NotificationManager.getDelta(NotificationManager.java:234)  
> at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:143)  
> at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:374)  
> at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1469)  
> at org.eclipse.core.internal.resources.Project.setDescription(Project.java:1270)  
> at org.eclipse.core.internal.resources.Project.setDescription(Project.java:1280)  
> at com.kms.katalon.groovy.util.GroovyUtil.initGroovyProjectDescription(GroovyUtil.java:588)  
> at com.kms.katalon.groovy.util.GroovyUtil.initGroovyProject(GroovyUtil.java:153)  
> at com.kms.katalon.controller.ProjectController.openProject(ProjectController.java:146)  
> at com.kms.katalon.execution.console.ConsoleMain.getProject(ConsoleMain.java:330)  
> at com.kms.katalon.execution.console.ConsoleMain.findProject(ConsoleMain.java:225)  
> at com.kms.katalon.execution.console.ConsoleMain.launch(ConsoleMain.java:128)  
> at com.kms.katalon.console.application.Application.runConsole(Application.java:76)  
> at com.kms.katalon.core.application.Application.runConsole(Application.java:87)  
> at com.kms.katalon.core.application.Application.start(Application.java:70)  
> 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)

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<div class="post-metadata">

**Author:** ![staniere](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/staniere/32/17333_2.png) [@staniere](https://forum.katalon.com/u/staniere)\
**Post date:** [July 24, 2019, 5:37pm UTC](https://forum.katalon.com/t/org-eclipse-core-internal-dtree-objectnotfoundexception-tree-element/30204/2 "2019-07-24T17:37:15Z")

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I found a way to get rid of this error by applying a trick found in this post ! : [Cannot open Katalon after latest update](http://forum.katalon.com/t/cannot-open-katalon-after-latest-update/24490/2)

I only had to delete folder D:\Integration\Katalon\config.metadata.plugins\org.eclipse.core.resources  
Katalon studio and jenkins jobs are wotking fine now 🙂

Is it forbidden to launch several Katalon jobs at the same time via Jenkins ?

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**Author:** ![system](https://europe1.discourse-cdn.com/katalon/original/3X/d/5/d55596ab02785a255798e87ede769734747b30c4.svg) [@system](https://forum.katalon.com/u/system)\
**Post date:** [July 23, 2020, 5:37pm UTC](https://forum.katalon.com/t/org-eclipse-core-internal-dtree-objectnotfoundexception-tree-element/30204/3 "2020-07-23T17:37:19Z")

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Closed on July 23, 2020, 5:37pm UTC

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