Sometimes obtain an alert with text: "failure", when I'm trying to complete a task, but If i restart tomcat error disappears:
15-nov-2010 12:23:45 org.springframework.extensions.webscripts.AbstractRuntime executeScript GRAVE: Exception from executeScript - redirecting to status template error: null java.lang.NullPointerException at org.activiti.engine.impl.form.JuelFormEngine.getFormTemplateString(JuelFormEngine.java:58) at org.activiti.engine.impl.form.JuelFormEngine.renderTaskForm(JuelFormEngine.java:44) at org.activiti.engine.impl.cmd.GetRenderedTaskFormCmd.execute(GetRenderedTaskFormCmd.java:62) at org.activiti.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:22) at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:36) at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33) at org.activiti.engine.impl.FormServiceImpl.getRenderedTaskForm(FormServiceImpl.java:44) at org.activiti.rest.api.task.TaskFormGet.executeStreamingWebScript(TaskFormGet.java:32) at org.activiti.rest.util.ActivitiStreamingWebScript.execute(ActivitiStreamingWebScript.java:65) at org.springframework.extensions.webscripts.PresentationContainer.executeScript(PresentationContainer.java:69) at org.springframework.extensions.webscripts.AbstractRuntime.executeScript(AbstractRuntime.java:333) at org.springframework.extensions.webscripts.AbstractRuntime.executeScript(AbstractRuntime.java:189) at org.springframework.extensions.webscripts.servlet.WebScriptServlet.service(WebScriptServlet.java:118) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Thread.java:619)
