DeploymentException: Unable to create folder

Hello,

i'm developing some enterprise service on a NetWeaver CE SP1 plattform and sometimes while deploying i encounter a DeploymentException: Unable to create folder. Whats the reason for this exception?

I can only resolve it with restarting the server and deploy the projects again...

regards,

Matthias

1. Exception has been returned while the '<application>_start_ccbpmear' was starting. Warning/Exception :
Error occurred while starting application <application>_start_ccbpmear and wait. 

Reason: Clusterwide exception: server ID 14616650:com.sap.engine.services.deploy.container.DeploymentException: Unable to create folder <root>\<application>_start_ccbpmear\EJBContainer\applicationjars
	at com.sap.engine.services.ejb3.container.ContainerInterfaceImpl$Actions.perform(ContainerInterfaceImpl.java:880)
	at com.sap.engine.services.ejb3.container.ContainerInterfaceImpl.makeStartInitially(ContainerInterfaceImpl.java:758)
	at com.sap.engine.services.deploy.server.application.StartInitiallyTransaction.makeStartInitially(StartInitiallyTransaction.java:181)
	at com.sap.engine.services.deploy.server.application.StartInitiallyTransaction.prepare(StartInitiallyTransaction.java:143)
	at com.sap.engine.services.deploy.server.application.ApplicationTransaction.makeAllPhasesOnOneServer(ApplicationTransaction.java:393)
	at com.sap.engine.services.deploy.server.application.StartTransaction.doStartInitiallyGlobal(StartTransaction.java:428)
	at com.sap.engine.services.deploy.server.application.StartTransaction.doStartInitially(StartTransaction.java:416)
	at com.sap.engine.services.deploy.server.application.StartTransaction.prepare(StartTransaction.java:170)
	at com.sap.engine.services.deploy.server.application.ApplicationTransaction.makeAllPhasesOnOneServer(ApplicationTransaction.java:393)
	at com.sap.engine.services.deploy.server.application.ApplicationTransaction.makeAllPhases(ApplicationTransaction.java:418)
	at com.sap.engine.services.deploy.server.application.ParallelAdapter.super_MakeAllPhases(ParallelAdapter.java:318)
	at com.sap.engine.services.deploy.server.application.StartTransaction.makeAllPhasesImpl(StartTransaction.java:533)
	at com.sap.engine.services.deploy.server.application.ParallelAdapter.runInTheSameThread(ParallelAdapter.java:230)
	at com.sap.engine.services.deploy.server.application.ParallelAdapter.makeAllPhasesAndWait(ParallelAdapter.java:374)
	at com.sap.engine.services.deploy.server.DeployServiceImpl.startApplicationAndWait(DeployServiceImpl.java:2955)
	at com.sap.engine.services.deploy.server.DeployServiceImpl.startApplicationAndWait(DeployServiceImpl.java:2885)
	at com.sap.engine.services.deploy.server.DeployServiceImpl.startApplicationAndWait(DeployServiceImpl.java:2861)
	at com.sap.engine.services.dc.lcm.impl.J2EELCMProcessor.doStart(J2EELCMProcessor.java:98)
	at com.sap.engine.services.dc.lcm.impl.LifeCycleManagerImpl.start(LifeCycleManagerImpl.java:62)
	at com.sap.engine.services.dc.cm.deploy.impl.LifeCycleManagerStartVisitor.visit(LifeCycleManagerStartVisitor.java:31)
	at com.sap.engine.services.dc.cm.deploy.impl.DeploymentItemImpl.accept(DeploymentItemImpl.java:83)
	at com.sap.engine.services.dc.cm.deploy.impl.DefaultDeployPostProcessor.postProcessDeplItem(DefaultDeployPostProcessor.java:70)
	at com.sap.engine.services.dc.cm.deploy.impl.DefaultDeployPostProcessor.postProcess(DefaultDeployPostProcessor.java:58)
	at com.sap.engine.services.dc.cm.deploy.impl.DeployerImpl.doPostProcessing(DeployerImpl.java:646)
	at com.sap.engine.services.dc.cm.deploy.impl.DeployerImpl.performDeploy(DeployerImpl.java:637)
	at com.sap.engine.services.dc.cm.deploy.impl.DeployerImpl.doDeploy(DeployerImpl.java:488)
	at com.sap.engine.services.dc.cm.deploy.impl.DeployerImpl.deploy(DeployerImpl.java:209)
	at com.sap.engine.services.dc.cm.deploy.impl.DeployerImpl.deploy(DeployerImpl.java:154)
	at com.sap.engine.services.dc.cm.deploy.impl.DeployerImplp4_Skel.dispatch(DeployerImplp4_Skel.java:875)
	at com.sap.engine.services.rmi_p4.DispatchImpl._runInternal(DispatchImpl.java:351)
	at com.sap.engine.services.rmi_p4.server.ServerDispatchImpl.run(ServerDispatchImpl.java:70)
	at com.sap.engine.services.rmi_p4.P4Message.process(P4Message.java:61)
	at com.sap.engine.services.rmi_p4.P4Message.execute(P4Message.java:36)
	at com.sap.engine.services.cross.fca.FCAConnectorImpl.executeRequest(FCAConnectorImpl.java:882)
	at com.sap.engine.services.rmi_p4.P4Message.process(P4Message.java:52)
	at com.sap.engine.services.cross.fca.MessageReader.run(MessageReader.java:59)
	at com.sap.engine.core.thread.execution.Executable.run(Executable.java:108)
	at com.sap.engine.core.thread.execution.CentralExecutor$SingleThread.run(CentralExecutor.java:287)
Caused by: com.sap.engine.services.ejb3.container.ActionException: Unable to create folder <root>\<application>_start_ccbpmear\EJBContainer\applicationjars
	at com.sap.engine.services.ejb3.container.FSMakeFolder.perform(FSMakeFolder.java:48)
	at com.sap.engine.services.ejb3.container.CompositeAction.perform(CompositeAction.java:81)
	at com.sap.engine.services.ejb3.container.ContainerInterfaceImpl$Actions.perform(ContainerInterfaceImpl.java:874)
	... 37 more