Is this 'unit' the script update_tables-development.cgi or another package ?

Why the .. ? now I'm guessing what you tried.
If you tried LogggedOn_user_id then obviously that won't work with 3 g's in it

:)

You know how people keep asking you to do the same thing ?

And they ask again and again and again?

And you never quite do exactly what they're asking?

And even when the problem was solved two days ago, you still can't see it?

The two things are connected

Now, can you or can you not post 20 lines of code that runs and reproduces the problem (self-contained bug report)?

No error logs, no fragments, just a small/short, self-contained program, which demonstrates the bug/problem?

See if you follow the guidelines of How do I post a question effectively?, , and create the "20 line bug report", we can better help you, and you can believe us when we do :)

You know how people keep asking you to do the same thing ? And they ask again and again and again? And you never quite do exactly what they're asking? And even when the problem was solved two days ago, you still can't see it? The two things are connected Now, can you or can you not post 20 lines of code that runs and reproduces the problem (self-contained bug report)?

I don't know how to answer you. I ran the little code blocks that were posted and they ran fine with no error.

Please explain how: And even when the problem was solved two days ago, you still can't see it?

Tell me again and I will implement "the change" required.

So a made a little pair of units and the variable is passed.

#!/usr/bin/perl
use strict;
use warnings;

use manageusers_2 qw($LoggedOn_user_id);

print "$LoggedOn_user_id\n";
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And

#!/usr/bin/perl
use warnings;
use strict;

package manageusers_2;

BEGIN {
    use vars qw($VERSION @ISA @EXPORT);
    use DBI;

#    $ENV{DBI_TRACE}=1;
#    $ENV{PERL_DBI_DEBUG}=1;

    require Exporter;

    @ISA = qw(Exporter);

    # exported functions
    our @EXPORT_OK = qw($LoggedOn_user_id);
    $VERSION = '0.0.1';
}

our $LoggedOn_user_id=428;
1;
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I made sure the aparameters in my real program were the same

It failed

$userid_1 = $manageusers::LoggedON_user_id;
warn("userid : '$userid_1' ");
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And the result is:

update_tables-development.cgi: Use of uninitialized value in concatena
+tion (.) or string at update_tables-development.cgi line 66.
userid : ''  at update_tables-development.cgi line 66.
[Sat Apr  8 13:55:38 2017] update_tables-development.cgi: userid : '' 
+ at update_tables-development.cgi line 66.
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$manageusers::LoggedON_user_id
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should be

$manageusers_2::LoggedOn_user_id
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obviously.

two days ago and one day ago both answer this

Now regarding Re^13: global var this is the output of your posted bug report

$ perl -I. tultalk
428
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It shows no bug , no problem , no errors, no warnings

The code you posted doesn't reproduce the problem you want to solve in your real program

If your real program were the same, then it should have no problem

But then you say your real program does have a problem

This is not productive way to solve problems