diff --git a/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs b/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs
index 779c7daf3..b732a3756 100644
--- a/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs
+++ b/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs
@@ -2610,7 +2610,7 @@ namespace IRaCIS.Core.Application.Service
             {
                 if (!_taskStudyRepository.Any(t => t.VisitTaskId == inDto.VisitTaskId))
                 {                  
-                    return ResponseOutput.NotOk("ReadingImage_BackImageNotExist");
+                    return ResponseOutput.NotOk(_localizer["ReadingImage_BackImageNotExist"]);
                 }
             }
             await VerifyTaskIsSign(inDto.VisitTaskId);