thank you again for your interest in this matter. I cannot easily upgrade to a newer version of LV, because I work on Macs, where it is tied with hardware (i.e. LV 7 is only available for Mac OS X ans this one does not work with the PCI-GPIB cards, only with the external Ethernet-GPIB box). I used the units feature for dimensions control during modelling implementation, so that I am warned if I the expected dimensions at the end don't match the expectation ones. I think I will settle for a two-step process, where I build the VI with units first and when the units are checked, I drop the units everywhere. In my case at least it won't take too long.