Hello All, Sorry for my basic English. I wanna to do a little project using Activiti. Part of the code(i use it in me 2nd task): FormService formService = processEngine.getFormService(); List<FormProperty> data = formService.getTaskFormData(taskId).getFormProperties(); // here if have org.activiti.engine.ActivitiIllegalArgumentException: Model value should be a String at org.activiti.engine.impl.form.EnumFormType.convertModelValueToFormValue(EnumFormType.java:55) at org.activiti.engine.impl.form.FormPropertyHandler.createFormProperty(FormPropertyHandler.java:67) at org.activiti.engine.impl.form.DefaultFormHandler.initializeFormProperties(DefaultFormHandler.java:86) at org.activiti.engine.impl.form.DefaultTaskFormHandler.createTaskForm(DefaultTaskFormHandler.java:36) at org.activiti.engine.impl.cmd.GetTaskFormCmd.execute(GetTaskFormCmd.java:56) at org.activiti.engine.impl.cmd.GetTaskFormCmd.execute(GetTaskFormCmd.java:32) at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:24) at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:57) at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:31) at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40) at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35) at org.activiti.engine.impl.FormServiceImpl.getTaskFormData(FormServiceImpl.java:58) …