diff --git a/import.php b/import.php
index 988a342..03b8b4c 100755
--- a/import.php
+++ b/import.php
@@ -2146,7 +2146,12 @@ if ($action == 'createinvoice' && $id > 0) {
                     // Invoice stays as draft - user can validate manually
 
                     // Copy PDF to invoice and register in ECM
+                    // Neuer Pfad: /imports/{id}/{filename}
                     $source_pdf = $conf->importzugferd->dir_output.'/imports/'.$import->id.'/'.$import->pdf_filename;
+                    // Fallback: Alter Pfad /imports/{ref}_{filename}
+                    if (!file_exists($source_pdf)) {
+                        $source_pdf = $conf->importzugferd->dir_output.'/imports/'.$import->ref.'_'.$import->pdf_filename;
+                    }
                     if (file_exists($source_pdf)) {
                         // Relativer Pfad für ECM (ohne DOL_DATA_ROOT Prefix)
                         $rel_dir = 'fournisseur/facture/'.get_exdir($invoice->id, 2, 0, 0, $invoice, 'invoice_supplier').$invoice->ref;