Reference Line in Trellis chart

[blaise]

I need to show a reference line in a trellis chart, but different lines for different dimension (the dimension that is "trellis'ed").

Is this possible? I have tried with simple if(Dim1='A',100,200) but this doesn't work.

I have also tried with a combo chart instead of Bar chart and creating the same expression as a line expression without luck.

Br Blaise