Update of Product Fails After .csv import

[nikitas]

I'm getting this error ->

Array
(
   [0] => Column 'id_word' cannot be null
   [1] => Array
       (
           [0] => (1,(SELECT id_word FROM ps_search_word WHERE word = 'ατσάλιν�' AND id_lang = 1 LIMIT 1),6)
       )

)


END

when i import products via the .csv file.
Please check the image for better understanding and the .csv file to.Thanx.

products_tel.csv