diff --git a/core/class/declarationtva.class.php b/core/class/declarationtva.class.php
index e2b28df..9f4d15a 100644
--- a/core/class/declarationtva.class.php
+++ b/core/class/declarationtva.class.php
@@ -1111,9 +1111,24 @@ class DeclarationTVA
             }
             
             // Try to add document record to Dolibarr (optional feature)
-            $ecmfiles_path = DOL_DOCUMENT_ROOT . '/core/class/ecmfiles.class.php';
+            // Try multiple possible paths for ecmfiles.class.php
+            $ecmfiles_paths = array(
+                DOL_DOCUMENT_ROOT . '/ecm/class/ecmfiles.class.php',
+                dirname(__FILE__) . '/../../../ecm/class/ecmfiles.class.php',
+                dirname(__FILE__) . '/../../../../ecm/class/ecmfiles.class.php',
+                DOL_DOCUMENT_ROOT . '/core/class/ecmfiles.class.php',
+                dirname(__FILE__) . '/../../../../core/class/ecmfiles.class.php'
+            );
             
-            if (file_exists($ecmfiles_path)) {
+            $ecmfiles_path = null;
+            foreach ($ecmfiles_paths as $path) {
+                if (file_exists($path)) {
+                    $ecmfiles_path = $path;
+                    break;
+                }
+            }
+            
+            if ($ecmfiles_path && file_exists($ecmfiles_path)) {
                 try {
                     require_once $ecmfiles_path;
                     $ecmfile = new EcmFiles($this->db);
@@ -1149,7 +1164,7 @@ class DeclarationTVA
                 }
             } else {
                 // Log that ECM files class is not available
-                error_log("DeclarationTVA: ECM files class not found at: " . $ecmfiles_path);
+                error_log("DeclarationTVA: ECM files class not found. Tried paths: " . implode(', ', $ecmfiles_paths));
             }
             
             // Return true even if ECM file creation failed - the PDF is still saved to disk