Mari,
If you want to search in a specific column of the internal table, you will have to copy the contents of just that column to another internal table and submit a search on the second internal table.
You haven't told us how you have coded, but if you are trying to use offset parameters, it is probably not designed for your requirement.
In my opinion, the statement is intended to search in an internal table containing long text data. In your case, you are probably better off looping on the itab and submitting a find on the specific column.
