I want to create some charts using sql reporting services. But i am unable to use a lot of functions and operators in combination with my data-fields the following work(Stroke-data type is decimal): > =Fields!Stroke.Value > =Sum(Fields!Stroke.Value) > =First(Fields!Stroke.Value) > =Last(Fields!Stroke.Value) > =2+2394.12 the following dont work: > =Fields!Stroke.Value + 2 > =CStr(Fields!Stroke.Value) > =CDbl(Fields!Stroke.Value) > =Fields!Stroke.Value / Fields!Stroke.Value > =Sum(Fields!Stroke.Value) * 2 all other operators and functions(using Fields!Stroke.Value) dont work too