Thanks to the people who already try to help me.
I'll try to be clearer, there were not that many information in the last post I apologies for this.
I give you an exemple of my database, the structure of the line depend of the caracters between the two bars, these caracters have the same position whatever the lines (it start with the 28 caracters and ends with the 35)
So my problem is that all my characters are in the same column and there isn't any separator for the differents values.
If it's not clear enough do not hesitate to tell me.
I probably can find something else to say.
Thanks a lot again