diff --git a/ChangeLog.md b/ChangeLog.md
index 40450f7..4e00490 100755
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,19 @@
 # CHANGELOG MODULE IMPORTZUGFERD FOR [DOLIBARR ERP CRM](https://www.dolibarr.org)
 
+## 3.4
+
+### Bugfixes
+- Fehlende Lieferantenpreise: EAN-basierte Suche nutzt jetzt Barcode aus Lieferantenpreis statt Artikelnummer
+- Fehlende Lieferantenpreise: Unique-Key auf Barcode entfernt (mehrere Lieferanten koennen gleichen EAN haben)
+- Fehlende Lieferantenpreise: Variable $extrafields Namenskollision mit Dolibarr-Core behoben
+- Fehlende Lieferantenpreise: Duplikate bei gleichen Produkten auf mehreren Rechnungszeilen vermieden
+- Produktauswahl: select2-Suche funktioniert jetzt auf allen Zeilen (eindeutige HTML-IDs)
+
+### Verbesserungen
+- Fehlende Lieferantenpreise in konsolidiertem Bereich unterhalb der Produkttabelle
+- Refresh-Button fuer Produktlisten nach Anlage neuer Produkte
+- Alle auswaehlen / Keine auswaehlen fuer fehlende Lieferantenpreise
+
 ## 3.3
 
 ### Sicherheit und Code-Qualitaet
diff --git a/core/modules/modImportZugferd.class.php b/core/modules/modImportZugferd.class.php
index 1a7eb6b..f4e8d9a 100755
--- a/core/modules/modImportZugferd.class.php
+++ b/core/modules/modImportZugferd.class.php
@@ -76,7 +76,7 @@ class modImportZugferd extends DolibarrModules
 		$this->editor_squarred_logo = '';					// Must be image filename into the module/img directory followed with @modulename. Example: 'myimage.png@importzugferd'
 
 		// Possible values for version are: 'development', 'experimental', 'dolibarr', 'dolibarr_deprecated', 'experimental_deprecated' or a version string like 'x.y.z'
-		$this->version = '3.3';
+		$this->version = '3.4';
 		// Url to the file with your last numberversion of this module
 		//$this->url_last_version = 'http://www.example.com/versionmodule.txt';
 
diff --git a/import.php b/import.php
index f97b6c1..83eb27c 100755
--- a/import.php
+++ b/import.php
@@ -77,6 +77,13 @@ $supplier_id = GETPOST('supplier_id', 'int');
 $line_id = GETPOST('line_id', 'int');
 $product_id = GETPOST('product_id', 'int');
 $template_product_id = GETPOST('template_product_id', 'int');
+// Zeilenspezifische Produkt-IDs (wegen eindeutiger select2-IDs pro Zeile)
+if (empty($product_id) && $line_id > 0) {
+    $product_id = GETPOST('product_id_'.$line_id, 'int');
+}
+if (empty($template_product_id) && $line_id > 0) {
+    $template_product_id = GETPOST('template_product_id_'.$line_id, 'int');
+}
 
 // Initialize objects
 $form = new Form($db);
@@ -499,21 +506,34 @@ if ($action == 'removeproduct' && $line_id > 0) {
     $import->fetch($id);
 }
 
-// Add missing supplier prices from other catalogs
+// Fehlende Lieferantenpreise aus anderen Katalogen hinzufuegen
 if ($action == 'addmissingprices' && $id > 0) {
     $import->fetch($id);
-    $fk_product = GETPOSTINT('fk_product');
-    $addSupplierPrices = GETPOST('add_supplier_prices', 'array');
-
-    if ($fk_product > 0 && !empty($addSupplierPrices)) {
-        require_once DOL_DOCUMENT_ROOT.'/fourn/class/fournisseur.product.class.php';
-        require_once './class/datanorm.class.php';
-        require_once './class/productmapping.class.php';
+    $selectedPrices = GETPOST('add_prices', 'array');
 
+    if (!empty($selectedPrices)) {
         $addedCount = 0;
+        $processedKeys = array();
+
+        foreach ($selectedPrices as $entry) {
+            // Duplikate ueberspringen
+            if (isset($processedKeys[$entry])) {
+                continue;
+            }
+            $processedKeys[$entry] = true;
+
+            $parts = explode(',', $entry);
+            if (count($parts) !== 3) {
+                continue;
+            }
+            $productId = (int) $parts[0];
+            $socId = (int) $parts[1];
+            $datanormId = (int) $parts[2];
+
+            if ($productId <= 0 || $socId <= 0 || $datanormId <= 0) {
+                continue;
+            }
 
-        foreach ($addSupplierPrices as $socId => $datanormId) {
-            // Fetch the Datanorm article
             $datanorm = new Datanorm($db);
             if ($datanorm->fetch($datanormId) > 0) {
                 $altSupplier = new Societe($db);
@@ -524,38 +544,16 @@ if ($action == 'addmissingprices' && $id > 0) {
                     $purchasePrice = $datanorm->price / $datanorm->price_unit;
                 }
 
-                // Prepare extrafields
-                $extrafields = array();
-                if (!empty($datanorm->metal_surcharge) && $datanorm->metal_surcharge > 0) {
-                    $extrafields['options_kupferzuschlag'] = $datanorm->metal_surcharge;
-                }
-                if (!empty($datanorm->price_unit) && $datanorm->price_unit > 1) {
-                    $extrafields['options_preiseinheit'] = $datanorm->price_unit;
-                }
-                if (!empty($datanorm->product_group)) {
-                    $extrafields['options_warengruppe'] = $datanorm->product_group;
-                }
-
-                // Add supplier price
-                $prodfourn = new ProductFournisseur($db);
-                $prodfourn->id = $fk_product;
-                $result = $prodfourn->update_buyprice(
-                    1, $purchasePrice, $user, 'HT', $altSupplier, 0,
-                    $datanorm->article_number, 19,
-                    0, 0, 0, 0, 0, 0, array(), '',
-                    0, 'HT', 1, '',
-                    trim($datanorm->short_text1 . ($datanorm->short_text2 ? ' ' . $datanorm->short_text2 : '')),
-                    !empty($datanorm->ean) ? $datanorm->ean : '',
-                    !empty($datanorm->ean) ? 2 : 0,
-                    $extrafields
-                );
+                $priceExtrafields = datanormBuildSupplierPriceExtrafields($datanorm);
+                $result = datanormAddSupplierPrice($db, $productId, $datanorm, $altSupplier, $user, $purchasePrice, 19, $priceExtrafields);
 
                 if ($result > 0) {
-                    // Create product mapping
+                    datanormInsertPriceExtrafields($db, $result, $priceExtrafields);
+
                     $mapping = new ProductMapping($db);
                     $mapping->fk_soc = $socId;
                     $mapping->supplier_ref = $datanorm->article_number;
-                    $mapping->fk_product = $fk_product;
+                    $mapping->fk_product = $productId;
                     $mapping->ean = $datanorm->ean;
                     $mapping->manufacturer_ref = $datanorm->manufacturer_ref;
                     $mapping->description = $datanorm->short_text1;
@@ -1968,6 +1966,7 @@ if ($action == 'edit' && $import->id > 0) {
     $allProductsMatched = true;
     $matchedLinesCount = 0;
     $totalLinesCount = count($lines);
+    $allMissingPrices = array(); // Fehlende Lieferantenpreise sammeln
 
     foreach ($lines as $line) {
         $hasProduct = ($line->fk_product > 0);
@@ -2069,44 +2068,48 @@ if ($action == 'edit' && $import->id > 0) {
             print '<i class="fas fa-times"></i>';
             print '</a>';
 
-            // Check for missing supplier prices from other catalogs
+            // Fehlende Lieferantenpreise aus anderen Katalogen sammeln (Anzeige weiter unten)
             if ($import->fk_soc > 0 && getDolGlobalString('IMPORTZUGFERD_DATANORM_SEARCH_ALL')) {
-                // Get existing supplier prices for this product
-                $sqlExistingPrices = "SELECT fk_soc FROM ".MAIN_DB_PREFIX."product_fournisseur_price";
+                // Alle vorhandenen Lieferantenpreise fuer dieses Produkt laden
+                $sqlExistingPrices = "SELECT fk_soc, price, barcode FROM ".MAIN_DB_PREFIX."product_fournisseur_price";
                 $sqlExistingPrices .= " WHERE fk_product = ".(int)$line->fk_product;
                 $resExistingPrices = $db->query($sqlExistingPrices);
                 $existingSupplierIds = array();
+                $currentSupplierPrice = 0;
+                $supplierEan = '';
                 if ($resExistingPrices) {
                     while ($objPrice = $db->fetch_object($resExistingPrices)) {
                         $existingSupplierIds[$objPrice->fk_soc] = true;
+                        // Preis und EAN vom Rechnungslieferanten merken
+                        if ($objPrice->fk_soc == $import->fk_soc) {
+                            $currentSupplierPrice = $objPrice->price;
+                            if (!empty($objPrice->barcode)) {
+                                $supplierEan = $objPrice->barcode;
+                            }
+                        }
                     }
                 }
 
-                // Get current supplier price for comparison
-                $currentSupplierPrice = 0;
-                if (isset($existingSupplierIds[$import->fk_soc])) {
-                    $sqlCurrentPrice = "SELECT price FROM ".MAIN_DB_PREFIX."product_fournisseur_price";
-                    $sqlCurrentPrice .= " WHERE fk_product = ".(int)$line->fk_product;
-                    $sqlCurrentPrice .= " AND fk_soc = ".(int)$import->fk_soc;
-                    $sqlCurrentPrice .= " ORDER BY unitprice ASC LIMIT 1";
-                    $resCurrentPrice = $db->query($sqlCurrentPrice);
-                    if ($resCurrentPrice && $db->num_rows($resCurrentPrice) > 0) {
-                        $objCurrentPrice = $db->fetch_object($resCurrentPrice);
-                        $currentSupplierPrice = $objCurrentPrice->price;
-                    }
-                }
+                // EAN-Quellen: 1. Lieferantenpreis-Barcode, 2. Import-Zeile EAN
+                $searchEan = !empty($supplierEan) ? $supplierEan : (!empty($line->ean) ? $line->ean : '');
 
-                // Search in all Datanorm catalogs for this article
                 $datanormSearch = new Datanorm($db);
-                $searchRef = !empty($line->supplier_ref) ? $line->supplier_ref : (!empty($line->ean) ? $line->ean : '');
-                if (!empty($searchRef)) {
-                    $allCatalogResults = $datanormSearch->searchByArticleNumber($searchRef, $import->fk_soc, true, 10);
+                $allCatalogResults = array();
+
+                // Primaer: EAN-Suche in Datanorm-Katalogen (zuverlaessigste Methode)
+                if (!empty($searchEan)) {
+                    $allCatalogResults = $datanormSearch->searchByArticleNumber($searchEan, $import->fk_soc, true, 10);
+                }
+                // Fallback: Lieferanten-Artikelnummer wenn EAN nichts fand
+                if (empty($allCatalogResults) && !empty($line->supplier_ref)) {
+                    $allCatalogResults = $datanormSearch->searchByArticleNumber($line->supplier_ref, $import->fk_soc, true, 10);
+                }
+
+                if (!empty($allCatalogResults)) {
 
-                    // Filter to only show suppliers without existing price
                     $missingSuppliers = array();
                     foreach ($allCatalogResults as $catalogResult) {
                         if (!isset($existingSupplierIds[$catalogResult['fk_soc']])) {
-                            // Load supplier name
                             $altSupplier = new Societe($db);
                             $altSupplier->fetch($catalogResult['fk_soc']);
 
@@ -2128,54 +2131,20 @@ if ($action == 'edit' && $import->id > 0) {
                         }
                     }
 
-                    // Show missing suppliers with checkboxes
                     if (!empty($missingSuppliers)) {
-                        print '<div style="margin-top: 8px; padding: 8px; background-color: #fcf8e3; border: 1px solid #faebcc; border-radius: 4px; font-size: 0.85em;">';
-                        print '<div style="font-weight: bold; color: #8a6d3b; margin-bottom: 5px;">';
-                        print '<i class="fas fa-plus-circle"></i> '.$langs->trans('MissingSupplierPrices');
-                        print '</div>';
-                        print '<form method="POST" action="'.$_SERVER['PHP_SELF'].'" style="margin: 0;">';
-                        print '<input type="hidden" name="token" value="'.newToken().'">';
-                        print '<input type="hidden" name="action" value="addmissingprices">';
-                        print '<input type="hidden" name="id" value="'.$import->id.'">';
-                        print '<input type="hidden" name="fk_product" value="'.$line->fk_product.'">';
+                        // Hinweis in der Zeile anzeigen
+                        print ' <span class="badge badge-warning" title="'.$langs->trans('MissingSupplierPrices').'"><i class="fas fa-plus-circle"></i> '.count($missingSuppliers).'</span>';
 
-                        foreach ($missingSuppliers as $missing) {
-                            $priceDiff = 0;
-                            $priceDiffPercent = 0;
-                            $diffHtml = '';
-
-                            if ($currentSupplierPrice > 0) {
-                                $priceDiff = $missing['purchase_price'] - $currentSupplierPrice;
-                                $priceDiffPercent = ($priceDiff / $currentSupplierPrice) * 100;
-
-                                if ($priceDiff < 0) {
-                                    $diffHtml = '<span style="color: #5cb85c;"><i class="fas fa-arrow-down"></i> '.number_format(abs($priceDiffPercent), 1).'%</span>';
-                                } elseif ($priceDiff > 0) {
-                                    $diffHtml = '<span style="color: #d9534f;"><i class="fas fa-arrow-up"></i> +'.number_format($priceDiffPercent, 1).'%</span>';
-                                } else {
-                                    $diffHtml = '<span class="opacitymedium">=</span>';
-                                }
-                            }
-
-                            print '<div style="padding: 3px 0;">';
-                            print '<label style="cursor: pointer;">';
-                            print '<input type="checkbox" name="add_supplier_prices['.$missing['fk_soc'].']" value="'.$missing['datanorm_id'].'" style="margin-right: 5px;">';
-                            print '<strong>'.dol_escape_htmltag($missing['supplier_name']).'</strong>';
-                            print ' <code style="font-size: 0.9em;">'.dol_escape_htmltag($missing['article_number']).'</code>';
-                            print ' @ <strong>'.price($missing['purchase_price']).'</strong>';
-                            if (!empty($diffHtml)) {
-                                print ' '.$diffHtml;
-                            }
-                            print '</label>';
-                            print '</div>';
+                        // Duplikate vermeiden (gleiches Produkt auf mehreren Rechnungszeilen)
+                        if (!isset($allMissingPrices[$line->fk_product])) {
+                            $allMissingPrices[$line->fk_product] = array(
+                                'product_id' => $line->fk_product,
+                                'product_ref' => $product->ref,
+                                'product_label' => $product->label,
+                                'current_price' => $currentSupplierPrice,
+                                'missing' => $missingSuppliers,
+                            );
                         }
-
-                        print '<button type="submit" class="button buttongen small" style="margin-top: 5px;">';
-                        print '<i class="fas fa-plus"></i> '.$langs->trans('AddSelectedPrices');
-                        print '</button>';
-                        print '</form>';
-                        print '</div>';
                     }
                 }
             }
@@ -2186,7 +2155,7 @@ if ($action == 'edit' && $import->id > 0) {
             print '<input type="hidden" name="action" value="assignproduct">';
             print '<input type="hidden" name="line_id" value="'.$line->id.'">';
             print '<input type="hidden" name="id" value="'.$import->id.'">';
-            print $form->select_produits('', 'product_id', '', 0, 0, -1, 2, '', 0, array(), 0, '1', 0, 'minwidth150 maxwidth200', 1, '', 0);
+            print $form->select_produits('', 'product_id_'.$line->id, '', 0, 0, -1, 2, '', 0, array(), 0, '1', 0, 'minwidth150 maxwidth200', 1, '', 0);
             print ' <button type="submit" class="button buttongen" title="'.$langs->trans('AssignProduct').'">';
             print '<i class="fas fa-link"></i>';
             print '</button>';
@@ -2212,6 +2181,11 @@ if ($action == 'edit' && $import->id > 0) {
             print '<i class="fas fa-plus-circle"></i> '.$langs->trans('CreateProduct');
             print '</a>';
 
+            // Refresh-Button nach Produktanlage
+            print ' <a href="'.$_SERVER['PHP_SELF'].'?id='.$import->id.'" class="button buttongen margintoponlyshort" title="'.$langs->trans('RefreshProductListHelp').'">';
+            print '<i class="fas fa-sync-alt"></i>';
+            print '</a>';
+
             // Product template
             print '<br>';
             print '<form method="POST" action="'.$_SERVER['PHP_SELF'].'" class="inline-block margintoponlyshort">';
@@ -2219,7 +2193,7 @@ if ($action == 'edit' && $import->id > 0) {
             print '<input type="hidden" name="action" value="duplicateproduct">';
             print '<input type="hidden" name="line_id" value="'.$line->id.'">';
             print '<input type="hidden" name="id" value="'.$import->id.'">';
-            print $form->select_produits('', 'template_product_id', '', 0, 0, -1, 2, '', 0, array(), 0, '1', 0, 'minwidth100 maxwidth150', 1, '', 0);
+            print $form->select_produits('', 'template_product_id_'.$line->id, '', 0, 0, -1, 2, '', 0, array(), 0, '1', 0, 'minwidth100 maxwidth150', 1, '', 0);
             print ' <button type="submit" class="button buttongen" title="'.$langs->trans('ProductTemplateHelp').'">';
             print '<i class="fas fa-copy"></i>';
             print '</button>';
@@ -2324,6 +2298,77 @@ if ($action == 'edit' && $import->id > 0) {
     print '</table>';
     print '</div>';
 
+    // Fehlende Lieferantenpreise - konsolidierter Bereich
+    if (!empty($allMissingPrices)) {
+        print '<div style="margin-top: 15px; padding: 12px; background-color: #fcf8e3; border: 1px solid #faebcc; border-radius: 4px;">';
+        print '<div class="titre" style="margin-bottom: 10px; color: #8a6d3b;">';
+        print '<i class="fas fa-plus-circle paddingright"></i>'.$langs->trans('MissingSupplierPrices');
+        $totalMissing = 0;
+        foreach ($allMissingPrices as $mp) {
+            $totalMissing += count($mp['missing']);
+        }
+        print ' <span class="badge badge-warning">'.$totalMissing.'</span>';
+        print '</div>';
+
+        print '<form method="POST" action="'.$_SERVER['PHP_SELF'].'">';
+        print '<input type="hidden" name="token" value="'.newToken().'">';
+        print '<input type="hidden" name="action" value="addmissingprices">';
+        print '<input type="hidden" name="id" value="'.$import->id.'">';
+
+        foreach ($allMissingPrices as $mpData) {
+            print '<div style="margin-bottom: 10px; padding: 8px; background-color: #fff; border: 1px solid #eee; border-radius: 3px;">';
+            print '<div style="font-weight: bold; margin-bottom: 5px;">';
+            print '<i class="fas fa-cube paddingright" style="color: #555;"></i>';
+            print dol_escape_htmltag($mpData['product_ref'].' - '.$mpData['product_label']);
+            if ($mpData['current_price'] > 0) {
+                print ' <span class="opacitymedium">('.price($mpData['current_price']).')</span>';
+            }
+            print '</div>';
+
+            foreach ($mpData['missing'] as $missing) {
+                $priceDiffHtml = '';
+                if ($mpData['current_price'] > 0) {
+                    $pDiff = $missing['purchase_price'] - $mpData['current_price'];
+                    $pDiffPercent = ($pDiff / $mpData['current_price']) * 100;
+                    if ($pDiff < 0) {
+                        $priceDiffHtml = ' <span style="color: #5cb85c;"><i class="fas fa-arrow-down"></i> '.number_format(abs($pDiffPercent), 1).'%</span>';
+                    } elseif ($pDiff > 0) {
+                        $priceDiffHtml = ' <span style="color: #d9534f;"><i class="fas fa-arrow-up"></i> +'.number_format($pDiffPercent, 1).'%</span>';
+                    } else {
+                        $priceDiffHtml = ' <span class="opacitymedium">=</span>';
+                    }
+                }
+
+                // Wert: productId,socId,datanormId
+                $cbValue = $mpData['product_id'].','.$missing['fk_soc'].','.$missing['datanorm_id'];
+                print '<div style="padding: 3px 0 3px 20px;">';
+                print '<label style="cursor: pointer; display: block;">';
+                print '<input type="checkbox" name="add_prices[]" value="'.dol_escape_htmltag($cbValue).'" checked class="cb-missing-price" style="margin-right: 5px;">';
+                print '<strong>'.dol_escape_htmltag($missing['supplier_name']).'</strong>';
+                print ' <code style="font-size: 0.9em;">'.dol_escape_htmltag($missing['article_number']).'</code>';
+                print ' @ <strong>'.price($missing['purchase_price']).'</strong>';
+                print $priceDiffHtml;
+                print '</label>';
+                print '</div>';
+            }
+            print '</div>';
+        }
+
+        // Alle auswaehlen / Keine auswaehlen + Submit
+        print '<div style="margin-top: 8px;">';
+        print '<a href="#" onclick="$(\'.cb-missing-price\').prop(\'checked\', true); return false;" class="small paddingright">'.$langs->trans('SelectAll').'</a>';
+        print ' / ';
+        print '<a href="#" onclick="$(\'.cb-missing-price\').prop(\'checked\', false); return false;" class="small paddingleft">'.$langs->trans('DeselectAll').'</a>';
+        print ' &nbsp; ';
+        print '<button type="submit" class="button buttongen">';
+        print '<i class="fas fa-plus paddingright"></i>'.$langs->trans('AddSelectedPrices');
+        print '</button>';
+        print '</div>';
+
+        print '</form>';
+        print '</div>';
+    }
+
     // Datanorm Preview Section (shown when preview action was triggered)
     if (!empty($datanormPreviewMatches)) {
         print '<div class="div-table-responsive-no-min" style="margin-top: 20px;">';
diff --git a/langs/de_DE/importzugferd.lang b/langs/de_DE/importzugferd.lang
index 910a8d5..17ababb 100755
--- a/langs/de_DE/importzugferd.lang
+++ b/langs/de_DE/importzugferd.lang
@@ -486,3 +486,6 @@ AddSelectedPrices = Ausgewählte hinzufügen
 SupplierPricesAdded = %s Lieferantenpreise hinzugefügt
 CheaperBy = %s%% günstiger
 MoreExpensiveBy = %s%% teurer
+RefreshProductListHelp = Produktlisten neu laden (nach Anlage neuer Produkte)
+SelectAll = Alle auswählen
+DeselectAll = Keine auswählen
diff --git a/langs/en_US/importzugferd.lang b/langs/en_US/importzugferd.lang
index 51694ec..a3252c0 100755
--- a/langs/en_US/importzugferd.lang
+++ b/langs/en_US/importzugferd.lang
@@ -417,3 +417,6 @@ AddSelectedPrices = Add Selected
 SupplierPricesAdded = %s supplier prices added
 CheaperBy = %s%% cheaper
 MoreExpensiveBy = %s%% more expensive
+RefreshProductListHelp = Refresh product lists (after creating new products)
+SelectAll = Select all
+DeselectAll = Deselect all