diff --git a/app/Http/Controllers/Repuve/CancellationController.php b/app/Http/Controllers/Repuve/CancellationController.php
index dd4862f..e0be38e 100644
--- a/app/Http/Controllers/Repuve/CancellationController.php
+++ b/app/Http/Controllers/Repuve/CancellationController.php
@@ -4,7 +4,7 @@
 
 use App\Http\Controllers\Controller;
 use App\Http\Requests\Repuve\CancelConstanciaRequest;
-use App\Models\CatalogCancellationReason;
+use Illuminate\Validation\ValidationException;
 use App\Models\Record;
 use App\Models\Tag;
 use App\Models\TagCancellationLog;
@@ -287,9 +287,18 @@ public function cancelarTagNoAsignado(Request $request)
                 'cancelled_by' => Auth::id(),
             ]);
 
-            // Cargar las relaciones necesarias
+            // Cargar las relaciones necesarias ANTES de usarlas
             $cancellationLog->load(['cancellationReason', 'cancelledBy']);
 
+            // Validar que la relación se cargó correctamente
+            if (!$cancellationLog->cancellationReason) {
+                DB::rollBack();
+                return ApiResponse::INTERNAL_ERROR->response([
+                    'message' => 'Error al cargar el motivo de cancelación.',
+                    'error' => 'La relación cancellationReason no se pudo cargar correctamente.',
+                ]);
+            }
+
             // Actualizar el módulo del tag si se proporciona
             if ($request->filled('module_id')) {
                 $tag->module_id = $request->module_id;
@@ -301,31 +310,31 @@ public function cancelarTagNoAsignado(Request $request)
 
             DB::commit();
 
+            // Recargar el tag con sus relaciones actualizadas
+            $tag->load(['status', 'cancellationLogs.cancellationReason', 'cancellationLogs.cancelledBy', 'module']);
+
+            // Obtener datos de cancelación del último log
+            $lastCancellation = $tag->cancellationLogs()
+                ->with(['cancellationReason', 'cancelledBy'])
+                ->latest()
+                ->first();
+
+            // Preparar datos para el PDF
+            $cancellationData = [
+                'fecha' => $lastCancellation ? $lastCancellation->cancellation_at->format('d/m/Y') : now()->format('d/m/Y'),
+                'folio' => $tag->folio ?? '',
+                'tag_number' => $tag->tag_number ?? 'N/A',
+                'motivo' => $lastCancellation && $lastCancellation->cancellationReason
+                    ? $lastCancellation->cancellationReason->name
+                    : 'No especificado',
+                'operador' => $lastCancellation && $lastCancellation->cancelledBy
+                    ? $lastCancellation->cancelledBy->name
+                    : 'Sistema',
+                'modulo' => $tag->module ? $tag->module->name : 'No especificado',
+                'ubicacion' => $tag->module ? $tag->module->address : 'No especificado',
+            ];
+
             try {
-                // Recargar el tag con sus relaciones actualizadas
-                $tag->load(['status', 'cancellationLogs.cancellationReason', 'cancellationLogs.cancelledBy', 'module']);
-
-                // Obtener datos de cancelación del último log
-                $lastCancellation = $tag->cancellationLogs()
-                    ->with(['cancellationReason', 'cancelledBy'])
-                    ->latest()
-                    ->first();
-
-                // Preparar datos para el PDF
-                $cancellationData = [
-                    'fecha' => $lastCancellation ? $lastCancellation->cancellation_at->format('d/m/Y') : now()->format('d/m/Y'),
-                    'folio' => $tag->folio ?? '',
-                    'tag_number' => $tag->tag_number ?? 'N/A',
-                    'motivo' => $lastCancellation && $lastCancellation->cancellationReason
-                        ? $lastCancellation->cancellationReason->name
-                        : 'No especificado',
-                    'operador' => $lastCancellation && $lastCancellation->cancelledBy
-                        ? $lastCancellation->cancelledBy->name
-                        : 'Sistema',
-                    'modulo' => $tag->module ? $tag->module->name : 'No especificado',
-                    'ubicacion' => $tag->module ? $tag->module->address : 'No especificado',
-                ];
-
                 $pdf = Pdf::loadView('pdfs.tag', [
                     'cancellation' => $cancellationData,
                 ])
@@ -338,32 +347,23 @@ public function cancelarTagNoAsignado(Request $request)
 
                 return $pdf->stream('constancia_cancelada_' . ($tag->tag_number ?? $tag->folio) . '.pdf');
             } catch (\Exception $e) {
-                // Si falla la generación del PDF, devolver respuesta JSON
-                Log::error('Error al generar PDF de tag cancelado: ' . $e->getMessage());
-
-                return ApiResponse::OK->response([
-                    'message' => 'Tag cancelado exitosamente (Error al generar PDF)',
-                    'tag' => [
-                        'id' => $tag->id,
-                        'tag_number' => $tag->tag_number,
-                        'folio' => $tag->folio,
-                        'previous_status' => 'Disponible',
-                        'new_status' => 'Dañado',
-                    ],
-                    'cancellation' => [
-                        'id' => $cancellationLog->id,
-                        'reason' => $cancellationLog->cancellationReason->name,
-                        'observations' => $cancellationLog->cancellation_observations,
-                        'cancelled_at' => $cancellationLog->cancellation_at->toDateTimeString(),
-                        'cancelled_by' => Auth::user()->name,
-                    ],
-                    'pdf_error' => $e->getMessage(),
+                // Retornar error como JSON
+                return ApiResponse::INTERNAL_ERROR->response([
+                    'message' => 'Tag cancelado pero error al generar PDF',
+                    'error' => $e->getMessage(),
                 ]);
             }
+
+        } catch (ValidationException $e) {
+            // Errores de validación
+            return ApiResponse::BAD_REQUEST->response([
+                'message' => 'Error de validación',
+                'errors' => $e->errors(),
+            ]);
+
         } catch (\Exception $e) {
             DB::rollBack();
-
-            return ApiResponse::BAD_REQUEST->response([
+            return ApiResponse::INTERNAL_ERROR->response([
                 'message' => 'Error al cancelar el tag',
                 'error' => $e->getMessage(),
             ]);