getting the correct position by using 
my @indx;
my $pos = 0;

while(<FH1>){
    my ($id, $seq) = split /\t/;
    push(@indx, "$id\t$pos");
    $pos = tell FH1;
}

[download]
thanks for that !!! trying to read the correct line now...

In reply to Re^4: seeking help for seek function by pearly
in thread seeking help for seek function by pearly

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