Wow. You are really reinveting the wheel here. The EMBOSS tools can do this as well. Here's a bioperl solution of one new file per sequence in the original file, named by accession number. No one should really waste their time writing a genbank parser unless it is homework... Note that 'genbank' can be substituted below with any of the supported formats (fasta, embl,swissprot,etc). 
use Bio::SeqIO.
my $in = Bio::SeqIO->new(-format => 'genbank', -file => $genfile);
while(my $seq = $in->next_seq ){ 
 my $acc =$seq->accession_number;
 my $out = Bio::SeqIO->new(-format => 'genbank',-file=>">$acc.gb");
 $out->write_seq($seq);
}

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In reply to Re: Spltting Genbank File by stajich
in thread Spltting Genbank File by perl_n00b

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