diff --git a/README.txt b/README.txt
index 204bb81..4cc0d8c 100644
--- a/README.txt
+++ b/README.txt
@@ -7,7 +7,7 @@ Installing webform2pdf Drupal module
  - Drupal 7.x - available for download from http://drupal.org/project/drupal
  - Webform Drupal module - available for download from http://drupal.org/project/webform
  - Webform2pdf Drupal module - available for download from http://drupal.org/project/webform2pdf
- - TCPDF - PHP class for generating PDF documents - available for download from http://www.tcpdf.org/
+ - TCPDF - PHP class for generating PDF documents - available for download from http://www.tcpdf.org/ Please note that TCPDF version should be bewtween 4.5.000 and 5.9.209
 
 2.Webform2pdf module installation with the TCPDF class:
   2.1 Extract downloaded webform2pdf.tar.gz file:
diff --git a/webform2pdf.install b/webform2pdf.install
index 83165e1..5915c7c 100644
--- a/webform2pdf.install
+++ b/webform2pdf.install
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * @file
  *   Webform2pdf module install/schema hooks.
@@ -8,17 +9,17 @@
  * Implements hook_install().
  */
 function webform2pdf_install() {
-  variable_set('webform2pdf_default', array( 'pdf_lib' => 'sites/all/libraries/tcpdf',
-    'download' => 0, 'pdf_send_email' => 0,
-    'page_format' => 'A4', 'page_orientation' => 'P', 'h_left_logo' => 0,
-    'h_right_logo' => 0, 'f_left_logo' => 0, 'f_right_logo' => 0,
-    'h_font_size' => 10, 'p_font_size' => 12, 'f_font_size' => 10,
-    'h_txt_align' => 'L', 'h_font_family' => 'dejavuserif',
-    'p_txt_align' => 'L', 'p_font_family' => 'dejavuserif',
-    'f_txt_align' => 'L', 'f_font_family' => 'dejavuserif',
-    'h_txt' => '', 'f_txt' => '', 'p_body' => '%email_values', 'format' => 'filtered_html',
-    'h_left_logo_size' => '270x205', 'h_right_logo_size' => '270x205',
-    'f_left_logo_size' => '270x56', 'f_right_logo_size' => '270x56',
+  variable_set('webform2pdf_default', array('pdf_lib' => 'sites/all/libraries/tcpdf',
+      'download' => 0, 'pdf_send_email' => 0,
+      'page_format' => 'A4', 'page_orientation' => 'P', 'h_left_logo' => 0,
+      'h_right_logo' => 0, 'f_left_logo' => 0, 'f_right_logo' => 0,
+      'h_font_size' => 10, 'p_font_size' => 12, 'f_font_size' => 10,
+      'h_txt_align' => 'L', 'h_font_family' => 'dejavuserif',
+      'p_txt_align' => 'L', 'p_font_family' => 'dejavuserif',
+      'f_txt_align' => 'L', 'f_font_family' => 'dejavuserif',
+      'h_txt' => '', 'f_txt' => '', 'p_body' => '%email_values', 'format' => 'filtered_html',
+      'h_left_logo_size' => '270x205', 'h_right_logo_size' => '270x205',
+      'f_left_logo_size' => '270x56', 'f_right_logo_size' => '270x56',
   ));
 }
 
@@ -27,7 +28,7 @@ function webform2pdf_install() {
  */
 function webform2pdf_enable() {
   $key = variable_get('webform2pdf_key', '');
-  if ( empty($key) ) {
+  if (empty($key)) {
     variable_set('webform2pdf_key', md5(uniqid(rand(), TRUE)));
   }
 }
@@ -44,201 +45,179 @@ function webform2pdf_uninstall() {
  */
 function webform2pdf_schema() {
   $schema['webform2pdf'] = array(
-    'description' => 'Database containing the settings of webform2pdf.',
-    'fields' => array(
-      'nid' => array(
-        'description' => 'The node identifier of a webform2pdf.',
-        'type' => 'int',
-        'unsigned' => TRUE,
-        'not null' => TRUE,
-      ),
-      'enabled' => array(
-        'description' => 'Show if a pdf will be generated: 0: OFF, 1: ON.',
-        'type' => 'int',
-        'size' => 'tiny',
-        'unsigned' => TRUE,
-        'not null' => TRUE,
-        'default' => 0,
-      ),
-
-      'download' => array(
-        'description' => 'Download PDF file after submitting the form.',
-        'type' => 'int',
-        'size' => 'tiny',
-        'unsigned' => TRUE,
-        'not null' => TRUE,
-        'default' => 0,
-      ),
-
-      'pdf_send_email' => array(
-        'description' => 'Attach PDF file as an attachment to the e-mail.',
-        'type' => 'int',
-        'size' => 'tiny',
-        'unsigned' => TRUE,
-        'not null' => TRUE,
-        'default' => 0,
-      ),
-
-      'no_send_email_addr' => array(
-         'type' => 'varchar',
-         'length' => 255,
-         'not null' => TRUE,
-         'default' => '',
-      ),
-
-      'page_format' => array(
-        'description' => 'Size of a page in the PDF document.',
-        'type' => 'varchar',
-        'length' => 20,
-        'not null' => TRUE,
-        'default' => 'A4',
-      ),
-
-      'page_orientation' => array(
-        'description' => 'Orientation of the PDF document.',
-        'type' => 'varchar',
-        'length' => 1,
-        'not null' => TRUE,
-        'default' => 'P',
-      ),
-
-      'h_left_logo' => array(
-        'description' => 'Logo on the left side of the header.',
-        'type' => 'int',
-        'unsigned' => TRUE,
-        'not null' => TRUE,
-        'default' => 0,
-      ),
-
-      'h_right_logo' => array(
-        'description' => 'Logo on the right side of the header.',
-        'type' => 'int',
-        'unsigned' => TRUE,
-        'not null' => TRUE,
-        'default' => 0,
-      ),
-
-      'f_left_logo' => array(
-        'description' => 'Logo on the left side of the footer.',
-        'type' => 'int',
-        'unsigned' => TRUE,
-        'not null' => TRUE,
-        'default' => 0,
-      ),
-
-      'f_right_logo' => array(
-        'description' => 'Logo on the right side of the footer.',
-        'type' => 'int',
-        'unsigned' => TRUE,
-        'not null' => TRUE,
-        'default' => 0,
-      ),
-
-      'h_font_size' => array(
-        'description' => 'Header text font size.',
-        'type' => 'int',
-        'size' => 'tiny',
-        'unsigned' => TRUE,
-        'not null' => TRUE,
-        'default' => 10,
-      ),
-
-      'p_font_size' => array(
-        'description' => 'Body text font size.',
-        'type' => 'int',
-        'size' => 'tiny',
-        'unsigned' => TRUE,
-        'not null' => TRUE,
-        'default' => 12,
-      ),
-
-      'f_font_size' => array(
-        'description' => 'Footer text font size.',
-        'type' => 'int',
-        'size' => 'tiny',
-        'unsigned' => TRUE,
-        'not null' => TRUE,
-        'default' => 10,
+      'description' => 'Database containing the settings of webform2pdf.',
+      'fields' => array(
+          'nid' => array(
+              'description' => 'The node identifier of a webform2pdf.',
+              'type' => 'int',
+              'unsigned' => TRUE,
+              'not null' => TRUE,
+          ),
+          'enabled' => array(
+              'description' => 'Show if a pdf will be generated: 0: OFF, 1: ON.',
+              'type' => 'int',
+              'size' => 'tiny',
+              'unsigned' => TRUE,
+              'not null' => TRUE,
+              'default' => 0,
+          ),
+          'download' => array(
+              'description' => 'Download PDF file after submitting the form.',
+              'type' => 'int',
+              'size' => 'tiny',
+              'unsigned' => TRUE,
+              'not null' => TRUE,
+              'default' => 0,
+          ),
+          'pdf_send_email' => array(
+              'description' => 'Attach PDF file as an attachment to the e-mail.',
+              'type' => 'int',
+              'size' => 'tiny',
+              'unsigned' => TRUE,
+              'not null' => TRUE,
+              'default' => 0,
+          ),
+          'no_send_email_addr' => array(
+              'type' => 'varchar',
+              'length' => 255,
+              'not null' => TRUE,
+              'default' => '',
+          ),
+          'page_format' => array(
+              'description' => 'Size of a page in the PDF document.',
+              'type' => 'varchar',
+              'length' => 20,
+              'not null' => TRUE,
+              'default' => 'A4',
+          ),
+          'page_orientation' => array(
+              'description' => 'Orientation of the PDF document.',
+              'type' => 'varchar',
+              'length' => 1,
+              'not null' => TRUE,
+              'default' => 'P',
+          ),
+          'h_left_logo' => array(
+              'description' => 'Logo on the left side of the header.',
+              'type' => 'int',
+              'unsigned' => TRUE,
+              'not null' => TRUE,
+              'default' => 0,
+          ),
+          'h_right_logo' => array(
+              'description' => 'Logo on the right side of the header.',
+              'type' => 'int',
+              'unsigned' => TRUE,
+              'not null' => TRUE,
+              'default' => 0,
+          ),
+          'f_left_logo' => array(
+              'description' => 'Logo on the left side of the footer.',
+              'type' => 'int',
+              'unsigned' => TRUE,
+              'not null' => TRUE,
+              'default' => 0,
+          ),
+          'f_right_logo' => array(
+              'description' => 'Logo on the right side of the footer.',
+              'type' => 'int',
+              'unsigned' => TRUE,
+              'not null' => TRUE,
+              'default' => 0,
+          ),
+          'h_font_size' => array(
+              'description' => 'Header text font size.',
+              'type' => 'int',
+              'size' => 'tiny',
+              'unsigned' => TRUE,
+              'not null' => TRUE,
+              'default' => 10,
+          ),
+          'p_font_size' => array(
+              'description' => 'Body text font size.',
+              'type' => 'int',
+              'size' => 'tiny',
+              'unsigned' => TRUE,
+              'not null' => TRUE,
+              'default' => 12,
+          ),
+          'f_font_size' => array(
+              'description' => 'Footer text font size.',
+              'type' => 'int',
+              'size' => 'tiny',
+              'unsigned' => TRUE,
+              'not null' => TRUE,
+              'default' => 10,
+          ),
+          'h_txt_align' => array(
+              'description' => 'Alignment of the header text.',
+              'type' => 'varchar',
+              'length' => 1,
+              'not null' => TRUE,
+              'default' => 'L',
+          ),
+          'h_font_family' => array(
+              'description' => 'Header text font type.',
+              'type' => 'varchar',
+              'length' => 20,
+              'not null' => TRUE,
+              'default' => 'dejavuserif',
+          ),
+          'p_txt_align' => array(
+              'description' => 'Alignment of the body text.',
+              'type' => 'varchar',
+              'length' => 1,
+              'not null' => TRUE,
+              'default' => 'L',
+          ),
+          'p_font_family' => array(
+              'description' => 'Font type of the body.',
+              'type' => 'varchar',
+              'length' => 20,
+              'not null' => TRUE,
+              'default' => 'dejavuserif',
+          ),
+          'f_txt_align' => array(
+              'description' => 'Footer text aligment.',
+              'type' => 'varchar',
+              'length' => 1,
+              'not null' => TRUE,
+              'default' => 'L',
+          ),
+          'f_font_family' => array(
+              'description' => 'Footer text font type.',
+              'type' => 'varchar',
+              'length' => 20,
+              'not null' => TRUE,
+              'default' => 'dejavuserif',
+          ),
+          'h_txt' => array(
+              'type' => 'text',
+              'not null' => TRUE,
+              'size' => 'normal',
+              'description' => 'Header text.',
+          ),
+          'f_txt' => array(
+              'type' => 'text',
+              'not null' => TRUE,
+              'size' => 'normal',
+              'description' => 'Footer text.',
+          ),
+          'p_body' => array(
+              'type' => 'text',
+              'not null' => TRUE,
+              'size' => 'normal',
+              'description' => 'Text of the body.',
+          ),
+          'format' => array(
+              'type' => 'varchar',
+              'length' => 255,
+              'not null' => TRUE,
+              'default' => '',
+              'description' => 'Text input format type.',
+          ),
       ),
-
-      'h_txt_align' => array(
-        'description' => 'Alignment of the header text.',
-        'type' => 'varchar',
-        'length' => 1,
-        'not null' => TRUE,
-        'default' => 'L',
-      ),
-
-      'h_font_family' => array(
-        'description' => 'Header text font type.',
-        'type' => 'varchar',
-        'length' => 20,
-        'not null' => TRUE,
-        'default' => 'dejavuserif',
-      ),
-
-      'p_txt_align' => array(
-        'description' => 'Alignment of the body text.',
-        'type' => 'varchar',
-        'length' => 1,
-        'not null' => TRUE,
-        'default' => 'L',
-      ),
-
-      'p_font_family' => array(
-        'description' => 'Font type of the body.',
-        'type' => 'varchar',
-        'length' => 20,
-        'not null' => TRUE,
-        'default' => 'dejavuserif',
-      ),
-
-      'f_txt_align' => array(
-        'description' => 'Footer text aligment.',
-        'type' => 'varchar',
-        'length' => 1,
-        'not null' => TRUE,
-        'default' => 'L',
-      ),
-
-      'f_font_family' => array(
-        'description' => 'Footer text font type.',
-        'type' => 'varchar',
-        'length' => 20,
-        'not null' => TRUE,
-        'default' => 'dejavuserif',
-      ),
-
-      'h_txt' => array(
-        'type' => 'text',
-        'not null' => TRUE,
-        'size' => 'normal',
-        'description' => 'Header text.',
-      ),
-
-      'f_txt' => array(
-        'type' => 'text',
-        'not null' => TRUE,
-        'size' => 'normal',
-        'description' => 'Footer text.',
-      ),
-
-      'p_body' => array(
-        'type' => 'text',
-        'not null' => TRUE,
-        'size' => 'normal',
-        'description' => 'Text of the body.',
-      ),
-
-      'format' => array(
-        'type' => 'varchar',
-        'length' => 255,
-        'not null' => TRUE,
-        'default' => '',
-        'description' => 'Text input format type.',
-      ),
-    ),
-    'primary key' => array('nid'),
+      'primary key' => array('nid'),
   );
   return $schema;
 }
@@ -256,25 +235,24 @@ function webform2pdf_update_6001() {
 
 function webform2pdf_update_6200() {
   $result = db_query("SELECT nid, no_send_email_addr FROM {webform2pdf} WHERE enabled = 1");
-  while ( $row = db_fetch_array($result) ) {
+  while ($row = db_fetch_array($result)) {
     $no_send_email_addr = unserialize($row['no_send_email_addr']);
     $no_send_email_addr = array_diff($no_send_email_addr, array(0));
-    if (!empty ($no_send_email_addr)) {
+    if (!empty($no_send_email_addr)) {
       $no_send_mail = array();
       $node = node_load($row['nid']);
 
       foreach ($no_send_email_addr as $key => $nomail) {
         if ($nomail === 'email') {
           foreach ($node->webform['emails'] as $eid => $email) {
-            if ( !is_numeric($email['email']) ) {
+            if (!is_numeric($email['email'])) {
               $no_send_mail[$eid] = $eid;
               break;
             }
           }
-        }
-        elseif (is_numeric($nomail)) {
+        } elseif (is_numeric($nomail)) {
           foreach ($node->webform['emails'] as $eid => $email) {
-            if ( $email['email'] == $nomail ) {
+            if ($email['email'] == $nomail) {
               $no_send_mail[$eid] = $eid;
               break;
             }
@@ -283,7 +261,7 @@ function webform2pdf_update_6200() {
       }
     }
 
-    if ( !empty($no_send_mail) ) {
+    if (!empty($no_send_mail)) {
       db_query("UPDATE {webform2pdf} SET no_send_email_addr = '%s' WHERE nid = %d", serialize($no_send_mail), $row['nid']);
     }
   }
@@ -303,12 +281,11 @@ function webform2pdf_update_7300(&$sandbox) {
     db_change_field('webform2pd', 'format', 'format', array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => ''));
     $sandbox['webform2pdf_convert'] = 0;
     $sandbox['webform2pdf_count'] = db_query("SELECT COUNT(nid) FROM {webform2pdf}")->fetchField();
-  }
-  else {
+  } else {
     $result = db_select('filter_format', 'f')
-      ->fields('f', array('format'))
-      ->condition('status', 0, '>')
-      ->execute();
+            ->fields('f', array('format'))
+            ->condition('status', 0, '>')
+            ->execute();
 
     $i = 0;
     while ($filter = $result->fetchAssoc()) {
@@ -331,10 +308,10 @@ function webform2pdf_update_7300(&$sandbox) {
       $p_body = strtr($setting->p_body, $tokens);
 
       db_update('webform2pdf')
-        ->fields(array('format' => $filters[$setting->format]))
-        ->fields(array('p_body' => $p_body))
-        ->condition('nid', $setting->nid)
-        ->execute();
+              ->fields(array('format' => $filters[$setting->format]))
+              ->fields(array('p_body' => $p_body))
+              ->condition('nid', $setting->nid)
+              ->execute();
       $sandbox['webform2pdf_convert']++;
     }
 
@@ -374,38 +351,48 @@ function webform2pdf_requirements($phase) {
     $default = variable_get('webform2pdf_default', '');
     $tcpdf_dir = libraries_get_path('tcpdf');
 
-    if ( !is_file($tcpdf_dir . '/tcpdf.php')   ) {
+    if (!is_file($tcpdf_dir . '/tcpdf.php')) {
       $error = TRUE;
       $value = $t('The Webform2PDF module requires you to !link.', array('!link' => l($t('set the TCPDF library directory'), 'admin/settings/webform2pdf')));
-    }
-    else {
+    } else {
       include_once($tcpdf_dir . '/tcpdf.php' );
+      /**
+       * PDF_PRODUCER has been removed since version 5.9.012 (2010-11-12)
+       * @link https://drupal.org/node/1183460 See print/pdf module issue
+       * 
+       */
       if (defined('PDF_PRODUCER')) {
         list($tmp, $version, $tmp) = explode(' ', PDF_PRODUCER);
-      }
-      else {
+      } else {
         $pdf = new TCPDF();
-        $version = $pdf->getTCPDFVersion();
+        /**
+         * Method getTCPDFVersion has been removed since TCPDF version 6.0.000
+         * @link http://sourceforge.net/p/tcpdf/code/ci/e691de8a1e4d25473c9f9206f036a3d933901e6a/tree/tcpdf.php?diff=a48f9f174c2575634bec1b2b4bbcd3eeca374ac5 see diff log
+         */
+        if (method_exists($pdf, 'getTCPDFVersion')) {
+          $version = $pdf->getTCPDFVersion();
+        } else {
+          $version = 'unknown';
+        }
       }
-      if ( version_compare('4.5.000', $version) >= 0) {
+      if (version_compare('4.5.000', $version) >= 0) {
         $error = TRUE;
-        $value = $t('The Webform2PDF module requires !TCPDF 4.5.000 or later, your version: !ver.', array('!TCPDF' => l('TCPDF', 'http://www.tcpdf.org/'), '!ver' => $version));
+        $value = $t('The Webform2PDF module requires !TCPDF between 4.5.000 and 5.9.209, your version: !ver.', array('!TCPDF' => l('TCPDF', 'http://www.tcpdf.org/'), '!ver' => $version));
       }
     }
   }
 
   if ($error) {
     $requirements['webform2pdf_tcpdf_library'] = array(
-      'title' => $t('TCPDF Library requirements'),
-      'value' => $value,
-      'severity' => REQUIREMENT_ERROR,
+        'title' => $t('TCPDF Library requirements'),
+        'value' => $value,
+        'severity' => REQUIREMENT_ERROR,
     );
-  }
-  else {
+  } else {
     $requirements['webform2pdf_tcpdf_library'] = array(
-      'title' => $t('TCPDF Library version'),
-      'value' => $version,
-      'severity' => REQUIREMENT_OK,
+        'title' => $t('TCPDF Library version'),
+        'value' => $version,
+        'severity' => REQUIREMENT_OK,
     );
   }