PROBLEM IN DATA display

PROBLEM IN DATA display

i am using netflow analyser.....it was working fine from last 20 days but from day before yesterday....it is havng some problem...>>>  when i open all devices it shows all the data correctly at the begning but when i open a particular interface in a device .....then when i open its application page .....all the data show me under unaccounted.....what is the problem  ...i cannot understand .....plz help me

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