diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1bf37c7..54daf0c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,12 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Fixed
 
 - Fix PDF export of tabs renamed in GLPI 11
+- Prevent PDF exports from failing when a network port has no instantiation type
+  or has multiple IP addresses.
+- Prevent software and software-version PDF exports from failing when an
+  installation has no associated user.
+- Use entity restriction criteria compatible with the GLPI query builder when
+  exporting software versions.
 
 ## [4.1.4] - 2026-07-30
 
diff --git a/inc/computer_softwareversion.class.php b/inc/computer_softwareversion.class.php
index 306ba5a..cff99a5 100644
--- a/inc/computer_softwareversion.class.php
+++ b/inc/computer_softwareversion.class.php
@@ -246,7 +246,6 @@ public static function pdfForItem(PluginPdfSimplePDF $pdf, CommonDBTM $item)
                         $tmp[] = $licname;
                     }
                 }
-                $linkUser = User::canView();
                 $pdf->displayLine(
                     $data['version'],
                     $compname,
@@ -255,13 +254,14 @@ public static function pdfForItem(PluginPdfSimplePDF $pdf, CommonDBTM $item)
                     $data['location'],
                     $data['state'],
                     $data['groupe'],
-                    formatUserName(
-                        $data['userid'],
-                        $data['username'],
-                        $data['userrealname'],
-                        $data['userfirstname'],
-                        $linkUser ? 1 : 0,
-                    ),
+                    ($data['userid'] === null
+                        ? ''
+                        : formatUserName(
+                            (int) $data['userid'],
+                            $data['username'],
+                            $data['userrealname'],
+                            $data['userfirstname'],
+                        )),
                     implode(', ', $tmp),
                     Html::convDate($data['date_install']),
                 );
@@ -307,7 +307,10 @@ public static function pdfForVersionByEntity(PluginPdfSimplePDF $pdf, SoftwareVe
         }
         $sql = ['SELECT' => ['id', 'completename'],
             'FROM'       => 'glpi_entities',
-            'WHERE'      => $dbu->getEntitiesRestrictRequest('glpi_entities'),
+            // getEntitiesRestrictRequest() returns a raw SQL string; feeding it to the
+            // array query builder produced "WHERE glpi_entities ( 1 )" and a MySQL
+            // error 1305. The criteria variant returns the array the builder expects.
+            'WHERE'      => $dbu->getEntitiesRestrictCriteria('glpi_entities'),
             'ORDER'      => 'completename'];
 
         foreach ($DB->request($sql) as $ID => $data) {
diff --git a/inc/item_softwareversion.class.php b/inc/item_softwareversion.class.php
index a67b47c..54b0fc1 100644
--- a/inc/item_softwareversion.class.php
+++ b/inc/item_softwareversion.class.php
@@ -284,7 +284,6 @@ public static function pdfForSoftware(PluginPdfSimplePDF $pdf, CommonDBTM $item)
                         $tmp[] = $licname;
                     }
                 }
-                $linkUser = User::canView();
                 $pdf->displayLine(
                     $data['version'],
                     $data['item_type'],
@@ -294,13 +293,14 @@ public static function pdfForSoftware(PluginPdfSimplePDF $pdf, CommonDBTM $item)
                     $data['location'],
                     $data['state'],
                     $data['groupe'],
-                    formatUserName(
-                        $data['userid'],
-                        $data['username'],
-                        $data['userrealname'],
-                        $data['userfirstname'],
-                        $linkUser ? 1 : 0,
-                    ),
+                    ($data['userid'] === null
+                        ? ''
+                        : formatUserName(
+                            (int) $data['userid'],
+                            $data['username'],
+                            $data['userrealname'],
+                            $data['userfirstname'],
+                        )),
                     implode(', ', $tmp),
                 );
             }
@@ -342,7 +342,10 @@ public static function pdfForVersionByEntity(PluginPdfSimplePDF $pdf, SoftwareVe
         }
         $sql = ['SELECT' => ['id', 'completename'],
             'FROM'       => 'glpi_entities',
-            'WHERE'      => $dbu->getEntitiesRestrictRequest('glpi_entities'),
+            // getEntitiesRestrictRequest() returns a raw SQL string; feeding it to the
+            // array query builder produced "WHERE glpi_entities ( 1 )" and a MySQL
+            // error 1305. The criteria variant returns the array the builder expects.
+            'WHERE'      => $dbu->getEntitiesRestrictCriteria('glpi_entities'),
             'ORDER'      => 'completename'];
 
         foreach ($DB->request($sql) as $ID => $data) {
diff --git a/inc/networkport.class.php b/inc/networkport.class.php
index 1d5a0ee..9a96040 100644
--- a/inc/networkport.class.php
+++ b/inc/networkport.class.php
@@ -73,8 +73,15 @@ public static function pdfForItem(PluginPdfSimplePDF $pdf, CommonDBTM $item)
             foreach ($result as $devid) {
                 $netport = new NetworkPort();
                 $netport->getfromDB(current($devid));
-                $instantiation_type = $netport->fields['instantiation_type'];
-                $instname           = call_user_func([$instantiation_type, 'getTypeName']);
+                // Ports created by the inventory may carry no instantiation type at
+                // all; call_user_func(['', 'getTypeName']) then raised a TypeError and
+                // aborted the whole document.
+                $instantiation_type = $netport->fields['instantiation_type'] ?? '';
+                if (!empty($instantiation_type) && is_a($instantiation_type, CommonDBTM::class, true)) {
+                    $instname = call_user_func([$instantiation_type, 'getTypeName']);
+                } else {
+                    $instname = NetworkPort::getTypeName(1);
+                }
                 $pdf->displayTitle('<b>' . $instname . '</b>');
 
                 $pdf->displayLine('<b>' . sprintf(
@@ -138,26 +145,35 @@ public static function pdfForItem(PluginPdfSimplePDF $pdf, CommonDBTM $item)
                     $netport->fields['mac'],
                 ));
 
-                $sqlip = ['LEFT JOIN' => ['glpi_networknames'
-                                               => ['FKEY' => ['glpi_ipaddresses' => 'items_id',
-                                                   'glpi_networknames'           => 'id'],
-                                                   ['glpi_ipaddresses.entities_id'
-                                                         => $_SESSION['glpiactive_entity']]]],
-                    'WHERE' => ['glpi_networknames.items_id' => $netport->fields['id']]];
-
-                $ipname = '';
-                $ip     = new IPAddress();
-                if ($ip->getFromDBByRequest($sqlip)) {
-                    $ipname = $ip->fields['name'];
-
-                    $pdf->displayLine('<b>' . sprintf(__s('%1$s: %2$s'), __s('ip') . '</b>', $ipname));
+                // A network port usually carries several addresses (IPv4 + IPv6).
+                // IPAddress::getFromDBByRequest() expects a single result and throws
+                // a TooManyResultsException as soon as there are two, which aborted
+                // the whole PDF. Iterate over every address instead.
+                $sqlip = ['SELECT' => ['glpi_ipaddresses.id AS id',
+                    'glpi_ipaddresses.name AS name'],
+                    'FROM'      => 'glpi_ipaddresses',
+                    'LEFT JOIN' => ['glpi_networknames'
+                                          => ['FKEY' => ['glpi_ipaddresses' => 'items_id',
+                                              'glpi_networknames'           => 'id']]],
+                    'WHERE' => ['glpi_networknames.items_id'  => $netport->fields['id'],
+                        'glpi_ipaddresses.itemtype'           => 'NetworkName',
+                        'glpi_ipaddresses.is_deleted'         => 0]
+                                  + $dbu->getEntitiesRestrictCriteria('glpi_ipaddresses'),
+                    'ORDER' => 'glpi_ipaddresses.name'];
+
+                foreach ($DB->request($sqlip) as $ipdata) {
+                    $pdf->displayLine('<b>' . sprintf(
+                        __s('%1$s: %2$s'),
+                        __s('ip') . '</b>',
+                        $ipdata['name'],
+                    ));
 
                     $sql = ['SELECT' => 'glpi_ipaddresses_ipnetworks.ipnetworks_id',
                         'FROM'       => 'glpi_ipaddresses_ipnetworks',
                         'LEFT JOIN'  => ['glpi_ipnetworks'
                                         => ['FKEY' => ['glpi_ipaddresses_ipnetworks' => 'ipnetworks_id',
                                             'glpi_ipnetworks'                        => 'id']]],
-                        'WHERE' => ['glpi_ipaddresses_ipnetworks.ipaddresses_id' => $ip->getID()]
+                        'WHERE' => ['glpi_ipaddresses_ipnetworks.ipaddresses_id' => $ipdata['id']]
                                        + $dbu->getEntitiesRestrictCriteria('glpi_ipnetworks')];
 
                     $res = $DB->request($sql);