IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs

@@ -646,7 +646,25 @@ namespace IRaCIS.Core.Application.Service.ReadingCalculate
                         else if (calculate.GetDecimalNullFun != null)
                         {
                             var value = await calculate.GetDecimalNullFun(inDto);
-                            item.Answer = value == null ? string.Empty : value.Value.ToString();
+                            if (value == null)
+                            {
+                                if (typeNAList.Contains(item.QuestionType ?? QuestionType.SOD))
+                                {
+                                    item.Answer = nameof(YesOrNoOrNa.NA);
+
+                                }
+                                else
+                                {
+                                    item.Answer = this.nAString;
+
+                                }
+
+                            }
+                            else
+
+                            {
+                                item.Answer = value==null?string.Empty: value.ToString();
+                            }
                         }
                         else if (calculate.GetStringFun != null)
                         {