? @MDAYNO + ", " + @MONTHNO
? "@MDAYNO, @MONTHNO"

returned

5
4, 1

I have tested this code with Kixtart version 4.51, 4.20 and 4.01 with same result. Kixtart Manual recommends using variables like in first line so I thought that this is a little bug or I have understood wrong. This is not a problem to me but I wanted to inform this feature.