partitioned table loading error

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1

I have a table partitioned on month that has a couple of text columns. It used to work well without any problem but today I got this error while trying to fetch a particular record

k){0!$[#.Q.pm;p3;(?).]@[x;0;p1[;y;z]]}

'./2015.09/table1/data#: File exists

Here data is a text(character array) column. The query I used to load this data is pasted below

select from table1 where month = 2015.09m, id like “abc”

Any idea what causes this type of error?

Thanks,
RG