It is terribly difficult to read your post as is, so I didn't. However, I've put together an example of what I think you're after. The first file is the script itself, which uses the A module (A.pm in the local directory). The A module exports a single function, and this module includes the B module which also exports a single function. It in turn uses the C module, which exports a single function, which prints an incoming string.

a_func() takes a single parameter, a string. It passes it to b_func(), which then passes it to c_func() which then prints it to the screen.

The flow is like this:

script
-> A::a_func("str") 
-> B::b_func("str") 
-> C::c_func("str") # c_func is what prints the data
[download]

The script:

use warnings;
use strict;

use lib '.';

use A qw(a_func);

a_func("a string");
[download]

The A module:

package A;

use lib '.';

use B qw(b_func); # load the 'B' package

use Exporter qw(import);
our @EXPORT_OK = qw(a_func);

sub a_func {
    my $str = shift;
    b_func($str);
}

1;
[download]

The B module:

package B;

use lib '.';

use C qw(c_func);

use Exporter qw(import);

our @EXPORT_OK = qw (b_func);

sub b_func {
    my $str = shift;
    c_func($str);
}

1;
[download]

The C module:

package C;

use Exporter qw(import);

our @EXPORT_OK = qw(c_func);

sub c_func {
    my $string_to_say = shift;
    print "$string_to_say\n";
}

1;
[download]

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