Hi,
I created relation:
Dim MassString As String
MassString = "volume(Extract_For_Volume_Measure\Extract.1 )*7860 * 1kg_m3"
MyParameterMasaForumla = MyPart.Relations.CreateFormula("FormulaMass", " ", MyProduct.UserRefProperties.Item("Mass"), MassString )
when I change my Part...