all i need is which commands or syntax will help me out in this . I have about 500000 records of record length 600 each . suppose on 25000th record i find that i have to change the 256th position. The value previously held is "N".now i want to move "Y" to it . Please help.

In reply to Re^2: how to update a field of a record in a large text file by sandeep
in thread how to update a field of a record in a large text file by sandeep

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