diff --git a/core/class/declarationtva_pdf.class.php b/core/class/declarationtva_pdf.class.php
index 26c40d4..f2c4c5c 100644
--- a/core/class/declarationtva_pdf.class.php
+++ b/core/class/declarationtva_pdf.class.php
@@ -205,8 +205,15 @@ class DeclarationTVA_PDF
         $result = $this->generateDetailedPDF($filepath, $declaration, $ca3_data, $company);
         
         if ($result) {
-            return $filepath;
+            // Verify file was actually created
+            if (file_exists($filepath)) {
+                return $filepath;
+            } else {
+                $this->error = "PDF file was not created at expected path: " . $filepath;
+                return false;
+            }
         } else {
+            $this->error = "PDF generation failed: " . $this->error;
             return false;
         }
     }
diff --git a/declarationtva_view.php b/declarationtva_view.php
index 2568e33..72b4463 100644
--- a/declarationtva_view.php
+++ b/declarationtva_view.php
@@ -100,16 +100,24 @@ if ($action == 'export_pdf_detailed') {
 
 if ($action == 'validate' && $token) {
     // Validate the declaration
+    setEventMessages("Starting validation process...", null, 'mesgs');
+    
     if ($declarationtva->validateDeclaration($id)) {
         setEventMessages($langs->trans("DeclarationValidated"), null, 'mesgs');
         
         // Generate and save detailed PDF to Dolibarr documents
+        setEventMessages("Loading PDF generator...", null, 'mesgs');
         require_once DOL_DOCUMENT_ROOT . '/custom/declarationtva/core/class/declarationtva_pdf.class.php';
         $pdf_generator = new DeclarationTVA_PDF($db);
         
+        setEventMessages("Generating detailed PDF...", null, 'mesgs');
         $pdf_path = $pdf_generator->generateDetailedCA3PDF($id);
+        
         if ($pdf_path && file_exists($pdf_path)) {
+            setEventMessages("PDF generated successfully: " . $pdf_path, null, 'mesgs');
+            
             // Save PDF to Dolibarr documents
+            setEventMessages("Saving PDF to documents...", null, 'mesgs');
             $save_result = $declarationtva->saveValidatedPDF($id, $pdf_path);
             if (!$save_result) {
                 setEventMessages("Warning: Declaration validated but PDF save failed: " . $declarationtva->error, null, 'warnings');
@@ -118,6 +126,8 @@ if ($action == 'validate' && $token) {
             }
         } else {
             setEventMessages("Warning: Declaration validated but PDF generation failed: " . $pdf_generator->error, null, 'warnings');
+            setEventMessages("PDF path returned: " . ($pdf_path ? $pdf_path : 'NULL'), null, 'warnings');
+            setEventMessages("File exists: " . ($pdf_path && file_exists($pdf_path) ? 'YES' : 'NO'), null, 'warnings');
         }
     } else {
         setEventMessages($langs->trans("ErrorValidatingDeclaration") . ": " . $declarationtva->error, null, 'errors');