I have defined 2 variables (var1,var2). The first variable is an expression of fields extracts from my LOAD and it works well. var1 = Sum([Field1])+Sum(Field2])
The second var is an expression of my first var (var1) and some fields extracts from my LOAD. In this case my expression returns null, because it looks like it not evaluate my first var. var2 = $(var1) + sum([Field3])
How can i use a var in the expression of another var?