- environment types (e.g. app, db, ha)

- field names (e.g. serverID, status, environment)

 my @keys = qw (serverID status environment);
my @env_types = qw (app db ha);
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That's why it's crucial, ... Also you can comment out anything you see fit.

If the DBI parts aren't what you're debugging, you too can omit that portion from your question :)

Some call it cleaning your room, but it is basic debugging, even for CGI/for CGI

Ok, trying that

#!/usr/bin/perl --
use strict; use warnings;
use CGI::FormBuilder;
{   
    my $env_choose = CGI::FormBuilder->new(
        fields   => [qw(env_type env_state)],
        header   => 1,
        method   => 'post',
        keepextras => 1,
     
    );

    if ($env_choose->submitted) {
        print $env_choose->confirm;
    }
}
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But this oddly produces NO OUTPUT

$ perl fbhuh

$ perl fbhuh env_type=something env_state=something EXTRA=STUFF
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Hmm, it doesn't die, it just produces no output

Hmm, only one print statement in a conditional , what happens if  $env_choose->submitted is false?

Add code

 else {
        print $env_choose->render;
    }
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Run it  $ perl fbhuh env_type=something env_state=something EXTRA=STUFF

and it outputs something

Read more... (2 kB)

And run it again, this time simulating submitting of the form $ perl fbhuh env_type=something env_state=something EXTRA=STUFF _submitted=1

Read more... (2 kB)

Oh look, it printed the confirmation screen

So it looks to me like you're not following the usage pattern closely enough  if( $form->... ){ print $form... } else { print $form ... }

Thanks, I'll look on my code again. May be I confused you with my vague explanations, but your example is not reflecting what I'm trying to do. I here it is: Example: "Multi screen mode"