Currently I am not using human task in my jbpm 6.5 project. But still while loading the persistence.xml file during runtime I am getting this error:

ERROR [org.jbpm.services.task.commands.InitDeadlinesCommand:Error when executing deadlines

java.lang.IllegalArgumentException: Named query not found: UnescalatedStartDeadlines

    at org.hibernate.ejb.AbstractEntityManagerImpl.createNamedQuery(AbstractEntityManagerImpl.java:601)

    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.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:347)

    at com.sun.proxy.$Proxy100.createNamedQuery(Unknown Source)

    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.kie.spring.persistence.AbstractKieSpringJpaManager$EmHolderDelegateInvocationHandler.invoke(AbstractKieSpringJpaManager.java:143)

    at com.sun.proxy.$Proxy101.createNamedQuery(Unknown Source)

    at org.jbpm.services.task.persistence.JPATaskPersistenceContext.queryInTransaction(JPATaskPersistenceContext.java:420)

    at org.jbpm.services.task.commands.InitDeadlinesCommand.execute(InitDeadlinesCommand.java:52)

    at org.jbpm.services.task.commands.InitDeadlinesCommand.execute(InitDeadlinesCommand.java:33)

    at org.jbpm.services.task.commands.TaskCommandExecutorImpl$SelfExecutionCommandService.execute(TaskCommandExecutorImpl.java:65)

    at org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:41)

    at org.jbpm.services.task.persistence.TaskTransactionInterceptor.execute(TaskTransactionInterceptor.java:69)

    at org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:41)

    at org.drools.persistence.jta.TransactionLockInterceptor.execute(TransactionLockInterceptor.java:73)

    at org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:41)

    at org.drools.persistence.jpa.OptimisticLockRetryInterceptor.execute(OptimisticLockRetryInterceptor.java:82)

    at org.jbpm.services.task.commands.TaskCommandExecutorImpl.execute(TaskCommandExecutorImpl.java:40)

    at org.jbpm.services.task.impl.TaskDeadlinesServiceImpl.initialize(TaskDeadlinesServiceImpl.java:367)

    at org.jbpm.services.task.HumanTaskConfigurator.getTaskService(HumanTaskConfigurator.java:157)

    at org.jbpm.runtime.manager.impl.factory.LocalTaskServiceFactory.newTaskService(LocalTaskServiceFactory.java:60)

    at org.jbpm.runtime.manager.impl.SingletonRuntimeManager.init(SingletonRuntimeManager.java:84)

    at org.jbpm.runtime.manager.impl.RuntimeManagerFactoryImpl.newSingletonRuntimeManager(RuntimeManagerFactoryImpl.java:64)

    at org.kie.spring.factorybeans.RuntimeManagerFactoryBean.getObject(RuntimeManagerFactoryBean.java:74)

    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:168)

    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:103)

    at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1600)

    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:254)

    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)

    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:351)

    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:108)

    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1481)

    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1226)

    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543)

    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)

    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)

    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)

    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)

    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)

    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:776)

    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861)

    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541)

    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)

    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93)

    at com.visa.fac.wf.WFServiceFactory.<clinit>(WFServiceFactory.java:34)

    at com.visa.fac.wf.web.InitServlet.init(InitServlet.java:33)

    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1231)

    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1144)

    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1031)

    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4914)

    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5201)

    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)

    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)

    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1399)

    at java.util.concurrent.FutureTask.run(FutureTask.java:266)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at java.lang.Thread.run(Thread.java:745)

How to prevent or surpress this error?? Also I am not using human task.