求教优化过程的问题

bitisight

请教跟个问题：
我在优化过程中有时出现：
bad optimationmode reason is 2?  请问什么意思？
还有一个就是优化结束时出现：excution results are not available for
this task,either the task has not been successfully run
or the plan used does not support the results summary mode ?
什么原因？我怎么修改