It seems, to me, given the above structure, that since the data i spread over multiple lines. the solution lies in using a flip-flop operator e.g. 
use warnings;
use strict;

my $save;

while (<DATA>) {
    if (/^\{TAG\}/ .. /^\{COUNT\}/) {
        unless (/^\{(TAG|COUNT)\}/) {
            $save = $_;
            print "{TAG} and {COUNT2} is 1\n" if /\sand\s/;
        }
    }
}

__DATA__
{TAG}
0012310002 and 0012310003
{COUNT}
000000
{COUNT2}
000000 and 100001

[download]
Produces (not entirely unexpectedly:-): 
$ perl tst.pl
0012310002 and 0012310003
$

[download]

Update:

Arrrgh!! Omitted 2nd question - now included. Also didn't show how to save the data between the given tags - also now included.

A user level that continues to overstate my experience :-))

In reply to Re: Check for 'and' by Bloodnok
in thread Check for 'and' by Anonymous Monk

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