diff --git a/IRaCIS.Core.Application/Service/ReadingCalculate/MRIPDFFCalculateService.cs b/IRaCIS.Core.Application/Service/ReadingCalculate/MRIPDFFCalculateService.cs
index 11d09a3af..20000ea39 100644
--- a/IRaCIS.Core.Application/Service/ReadingCalculate/MRIPDFFCalculateService.cs
+++ b/IRaCIS.Core.Application/Service/ReadingCalculate/MRIPDFFCalculateService.cs
@@ -596,6 +596,10 @@ namespace IRaCIS.Core.Application.Service.ReadingCalculate
 
             var tableQuestionList = rowInfo.Where(x=>x.TableQuestionList.Any(x=>x.QuestionMark== QuestionMark.IsMeasurable&& x.Answer.EqEnum(YesOrNoOrNa.Yes))).SelectMany(x => x.TableQuestionList).ToList();
 
+            if (tableQuestionList.Count() == 0)
+            {
+                return result;
+            }
             result = tableQuestionList.Where(x => x.QuestionMark == QuestionMark.AverageValue).Average(x => x.Answer.IsNullOrEmptyReturn0());
             return result;