This opens IN for output 
open(IN, ">>", "rep_set_ass_tax.fna") or die "Died!!";

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it should be 
open(IN, "<", "rep_set_ass_tax.fna") or die "Died!!";

[download]
poj

In reply to Re^3: writing array element to a file by poj
in thread writing array element to a file by francesca1987

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