diff --git a/IRaCIS.Core.Application/Service/ReadingCalculate/MRIPDFFCalculateService.cs b/IRaCIS.Core.Application/Service/ReadingCalculate/MRIPDFFCalculateService.cs
index 3667ada44..85330984f 100644
--- a/IRaCIS.Core.Application/Service/ReadingCalculate/MRIPDFFCalculateService.cs
+++ b/IRaCIS.Core.Application/Service/ReadingCalculate/MRIPDFFCalculateService.cs
@@ -415,7 +415,7 @@ namespace IRaCIS.Core.Application.Service.ReadingCalculate
                 }
 
 
-                num = num++;
+                num = num+1;
             }
             await _readingTableAnswerRowInfoRepository.AddRangeAsync(rowlist);
             await _readingTableQuestionAnswerRepository.AddRangeAsync(tableAnswerList);