example script snippet (not entirely self-contained, sorry, you need a
dataset that contains obs 2000:1):
bundle b = null
string s1 = "2000:1"
eval obsnum(s1) # gives valid number
b.str1 = s1 # bundle b pre-existing
printf "%s\n", b.str1 # gives "2000:1"
eval obsnum(b.str1) # gives "NA"!?
I know / have been told that _commands_ often cannot understand the
bundle syntax. (So 'var mybundle.lagorder mylist' doesn't work.) But I
would think that a _function_ like obsnum() should work with stuff like