Poi write Excel problem

There is a way in HSSFSheet Poi autoSizeColumn (int colunm), cell values ​​automatically adapt to the size of the cell , but this method is not restricted ? I write Excel rows less than 25 when there is no problem , but the big equal to 25 , it will report an array overflow exception.
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HSSFSheet these data did not encounter similar /
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replaced by another function autoSizeColumn (int column, boolean useMergedCells) useMergedCells set to true
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  The reply deleted by an administrator at 2013-09-27 15:47:09

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I did not merge cells , so that function the same error. Well , no, when printing their adjusted .