Hi, I'm trying to call a method with a null value in IF statement: =Iif(IsNothing(Sum(Fields!BuildTypeInt.Value, "TestExecutions")),"Not Defined",Enums.Parse.IntValueToString(Sum(Fields!BuildTypeInt.Value, "TestExecutions"))) I mean, I need to call the method only if the value is not null, But, I can see that even if the value is null the expression looks at Enums.Parse.IntValueToString(Sum(Fields!BuildTypeInt.Value, "TestExecutions")) and returns #Error. Can you please help me solve this issue? Regards, Bader

Hi Bader, Could you please describe the expression "Enums.Parse.IntValueToString(Sum(Fields!BuildTypeInt.Value, "TestExecutions")" with more detail? In Reporting Services, we can use custom code references in expressions. For more information, please see: http://msdn.microsoft.com/en-us/library/ms155798(v=sql.100).aspx Regards, Bin Long TechNet Subscriber Support If you are TechNet Subscriptionuser and have any feedback on our support quality, please send your feedback here. Bin Long TechNet Community Support