Untested: 
open BIG, 'big_file';
my $i = 1;

while (<BIG>) {
  open OUT, ">outfile_" .$i++; #BUG: see follow up below.

  if ( m/^\$\n$/ ) {
    close OUT;
    open OUT, ">outfile_" .$i++;
    next;
  }

  print OUT;
}

close OUT;

[download]
Doesn't deal with your naming but that should be easy to add.

PS. if you intend to create 22000 files you should probably put them into subdirectories, not all in one directory.

--tidiness is the memory loss of environmental mnemonics

In reply to Re: Splitting long file by EvdB
in thread Splitting long file by Micz

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