The trail has already expired ;) I'll set it up on another machine.
I tried the same with expt.currentgroupnumber to additionally get the groupnumber, but that throws a non valid error.
#1: You don't need that because you already have that information in script.groupid as discussed previously.
#2: It's expt.exptname.currentgroupnumber. For unnamed expts it would be expt.1.currentgroupnumber, expt.2.currentgroupnumber, etc. I'm sure you see why that won't do any good.
#3: There is script.currentexpt.
(bow) and thanks for your help