Look at your web server's error log; it'll tell you what's wrong.

Update: also you forgot a semicolon after the use statement; that'll break any subsequent statement.

Here's a WAG-load of possible issues, because you haven't given us (well, me anyway, to be sure I understand your problem (more on this, below).

• Is myModule stored in "D:\Website\One\cgi-bin\" or stored in your site lib or similar?

  Is "Websiste" a typo?
  Why are the first two path elements preceded by a double back-shash whereas the third element has only a single backslash?
  And what happens if you add a trailing backslash(after "cgi-bin")?

• Are you relying on myModule to process the params received from a conventional cgi-script? If not, what is doing the processing?
• Probably irrelevant, but you are showing us a Win32 location which begs that I ask -- Apache? IIS? something else?
• Are you getting any kind of error messages or warnings, with any of your variations?
  And what does your log (server log) have that might help id the problem? If so, we'll offer much better help if you quote them, verbatim.

Re shortage of detail about your problem, numerous FAQS on how to ask a question explain what kind of info we need (including that noted above). Please read On asking for help, How do I post a question effectively? and I know what I mean. Why don't you?.

Hi Monks,

Per error log, I have problem with myModule.pm

# code of myModule
use strict;
use warnings;
use diagnostics;

package myModule;

# sub routine one for generating HTML content
# sub routine two for generating HTML content

# sub routine third for database content
# some of its code
# database disconnection
$dbh->disconnect;

1;
[download]

This is apache error log

This is apache error log:[Sun Feb 16 23:16:59 2014] [error] [client 12
+7.0.0.1] [Sun Feb 16 23:16:59 2014] validate.pl: DBI::db=HASH(0x164d9
+fc)->disconnect invalidates 1 active statement handle (either destroy
+ statement handles or call finish on them before disconnecting) at D:
+\\websites\\One\\cgi-bin/Epanvel.pm line 466., referer: http://localh
+ost/cgi-bin/validate.pl
[download]

myModule is stored in D:\\websites\\One\\cgi-bin (D:\websites\One\cgi-bin). Dynamically using package myModule through use command.

Yes, Webssite was a typo, but my intention was to present problem, in general way

No, errors, but just blank POST request data.

myModule may or may not have function to process, HTTP requests.

Regards

... myModule may or may not have function to process, HTTP requests.

Great, good luck with that :)

One way this could happen is using  my $q = CGI->new; instead of  my $q = CGI->new( { } );

First version will consume POST data the second one won't

Hi Anonymous Monk,

You said

my $q = CGI->new; instead of  my $q = CGI->new( { } );
[download]

and

. . . reads all the POST data and makes it unavailable to your main pr
+ogram
[download]

Yes both, cases were true. I changed them and now everything is working fine. Just to confirm whether I am following good coding practice or not, below are my few doubts on same line.

1. myModule has following code in its new sub routine, does it has any flaws:

   sub new { 
       bless {}, shift 
   }
   [download]

2. How do I use relative name scheme? (instead, of using : use lib 'D:\\Websiste\\One\cgi-bin';) I tried earlier, but it failed. Normal CGI scripts and myModule are in same directory.
3. In myModule, I was using my $session = CGI::Session->load or die CGI::Session->errstr; at global scope to check sessions, before generating HTML contents. Now after your suggestion, I moved same code in each sub routine. But this duplicates code, and I have to write it in, every sub routine. Is there any work around for same. Or all session handling code should be put into different sub routine.

myModule has following code in its new sub routine, does it has any flaws:

I don't see any flaws with that "class method"

2. How do I use relative name scheme? (instead, of using : use lib 'D:\\Websiste\\One\cgi-bin';) I tried earlier, but it failed. Normal CGI scripts and myModule are in same directory.

?? File::FindLib - Find and use a file/dir from a directory above your script file
?? FindBin - Locate directory of original perl script

In myModule, I was using my $session = CGI::Session->load or die CGI::Session->errstr; at global scope to check sessions, before generating HTML contents. Now after your suggestion, I moved same code in each sub routine. But this duplicates code, and I have to write it in, every sub routine. Is there any work around for same. Or all session handling code should be put into different sub routine.

Um, try

sub new {
  my( $class, %args ) = @_;
  my $self        = bless { %args }, $class
  my $query       = CGI->new;
  my $sessionargs = $self->{sessionargs} || $default_sessionargs;
  my $session = CGI::Session->load(
      $sessionargs->{dsn}, $query, $sessionargs->{dsn_args},
  ) or die CGI::Session->errstr;
  $self->{query}   = $query;
  $self->{session} = $session;
  return $self;
}
sub param {
    my $self = shift;
    $self->{query}->param( @_ );
}
sub session { $_[0]->{session}; }
sub fandango {
    my( $self ) = @_;
    $self->param ...;
    ...;
    $self->session->param ...;
    ...;
}
[download]

Things like that, see http://cgi-app.org//CGI::Application
http://mojolicio.us/perldoc/Mojolicious/Guides/Growing
Re^3: web applications: what is the correct way to realise web applications
Re: I need wisdom on structuring procedural code in Catalyst
Re: Form validation and best practice in CGI::Application
Re^2: mod_perl website structure
Re^2: High level OOP query ( Building Skills Object-Oriented Design Mindset Development )
Re^3: High level OOP query (internal data),
Re: RFC: beginner level script improvement (version control)
Re: Perl MIME parser partially works with my code I wrote (code does not exist , there is no code)

Oops! I replied, to your first post, without reading, this one.

Testing, what you have said, and would communicate back results. Thanks for giving pointer.