resource monitor display NA ,but it used to work .

resource monitor display NA ,but it used to work .

i am using opmanager 6.0 ,which was updated from 5.5.
and it works well for long time,but i found lots of resource monitor doesn't work,and if i delete the server ,and add it again , it can display well.
but the history will lost!
what can i do?


thanks!





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