java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at org.hibernate.hql.antlr.HqlSqlBaseWalker.joinElement(HqlSqlBaseWalker.java:3022)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:2841)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:2719)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:513)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:371)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:201)
at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:189)
at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:130)
at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:83)
at org.hibernate.impl.SessionFactoryImpl.getQuery(SessionFactoryImpl.java:424)
at org.hibernate.impl.SessionImpl.getQueries(SessionImpl.java:870)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:820)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:74)
at br.com.sysmap.sunlight.dao.hibernate.HibBaseDAO$3.doInHibernate(HibBaseDAO.java:357)
at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:312)
at br.com.sysmap.sunlight.dao.hibernate.HibBaseDAO.listWithFields(HibBaseDAO.java:256)
at br.com.sysmap.sunlight.service.impl.BaseServiceImpl.listWithFields(BaseServiceImpl.java:151)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:288)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:155)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:144)
at br.com.sysmap.sunlight.web.components.SLDataSource.getCollection(SLDataSource.java:261)
at br.com.sysmap.sunlight.web.components.SLAbstractGrid.getCollection(SLAbstractGrid.java:124)
at br.com.sysmap.sunlight.web.components.SLSummary.getCollection(SLSummary.java:81)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.taglibs.standard.lang.jstl.ArraySuffix.evaluate(ArraySuffix.java:278)
at org.apache.taglibs.standard.lang.jstl.ComplexValue.evaluate(ComplexValue.java:107)
at org.apache.taglibs.standard.lang.jstl.ELEvaluator.evaluate(ELEvaluator.java:204)
at org.apache.taglibs.standard.lang.jstl.ELEvaluator.evaluate(ELEvaluator.java:163)
at org.apache.taglibs.standard.lang.jstl.Evaluator.evaluate(Evaluator.java:101)
at org.apache.taglibs.standard.lang.jstl.Evaluator.evaluate(Evaluator.java:129)
at org.displaytag.tags.el.ExpressionEvaluator.eval(ExpressionEvaluator.java:65)
at org.displaytag.tags.el.ELTableTag.evaluateExpressions(ELTableTag.java:381)
at org.apache.jsp.tag.web.summary_tag._jspx_meth_display_table_0(org.apache.jsp.tag.web.summary_tag:808)
at org.apache.jsp.tag.web.summary_tag.doTag(org.apache.jsp.tag.web.summary_tag:298)
at org.apache.jsp.pages.BloqueioDesbloqueio_jsp._jspx_meth_sl_summary_0(org.apache.jsp.pages.BloqueioDesbloqueio_jsp:435)
at org.apache.jsp.pages.BloqueioDesbloqueio_jsp.access$23(org.apache.jsp.pages.BloqueioDesbloqueio_jsp:421)
at org.apache.jsp.pages.BloqueioDesbloqueio_jsp$BloqueioDesbloqueio_jspHelper.invoke0(org.apache.jsp.pages.BloqueioDesbloqueio_jsp:999)
at org.apache.jsp.pages.BloqueioDesbloqueio_jsp$BloqueioDesbloqueio_jspHelper.invoke(org.apache.jsp.pages.BloqueioDesbloqueio_jsp:1153)
at org.apache.jsp.tag.web.screen_tag$screen_tagHelper.invoke0(org.apache.jsp.tag.web.screen_tag:473)
at org.apache.jsp.tag.web.screen_tag$screen_tagHelper.invoke(org.apache.jsp.tag.web.screen_tag:503)
at org.apache.jsp.tag.web.form_tag.doTag(org.apache.jsp.tag.web.form_tag:226)
at org.apache.jsp.tag.web.screen_tag._jspx_meth_sl_form_0(org.apache.jsp.tag.web.screen_tag:401)
at org.apache.jsp.tag.web.screen_tag._jspx_meth_c_when_0(org.apache.jsp.tag.web.screen_tag:369)
at org.apache.jsp.tag.web.screen_tag._jspx_meth_c_choose_0(org.apache.jsp.tag.web.screen_tag:335)
at org.apache.jsp.tag.web.screen_tag._jspx_meth_html_html_0(org.apache.jsp.tag.web.screen_tag:253)
at org.apache.jsp.tag.web.screen_tag.doTag(org.apache.jsp.tag.web.screen_tag:173)
at org.apache.jsp.pages.BloqueioDesbloqueio_jsp._jspx_meth_sl_screen_0(org.apache.jsp.pages.BloqueioDesbloqueio_jsp:98)
at org.apache.jsp.pages.BloqueioDesbloqueio_jsp._jspService(org.apache.jsp.pages.BloqueioDesbloqueio_jsp:68)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1063)
at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:263)
at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:386)
at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:318)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:229)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:153)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
at java.lang.Thread.run(Thread.java:534)

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