[Pcell] How do I create a Label for a rodCreatePolygon - Function?

Hi guys,

I need to create a label through coding/script in a Pcell.

When I try to create a label for my polygon shape, the code is getting compiled without any errors, but the label does not appear.

        pcDefinePCell(
    
    list(ddGetObj("ex") "Pcell" "layout")
    (
        (MET1 t)

    )

rodCreatePolygon(
            ?layer list("MET1" "pin")
            ?pts list( 0:0 1:0 1:1 1:0)
            ?pinLabel t
            ?pinLabelLayer list("MET1" "pin")
            ?pinLabelHeight 0.3
            )
        )

Is there another way to create a Label through script in a pcell? Or did I something wrong?