Hi, here are some examples, failures at the bottom: <hansl> clear nulldata 20 bundle b = null series s = normal() series b.ss = s print b # 1. one series directly into list -- works list L = s list L print # 2. one-element list to list in bundle -- works list b.LL = L eval nelem(b.LL) eval varnames(b.LL) # 3. one-element list from bundle into list -- works list L2 = b.LL list L2 print # 4. one series from bundle into list catch list L3 = b.ss # fails ("datatype not conformable") # (and 'list L3 = null; L3 += b.ss' doesn't work, either) # workaround: if $error list L3 = genseries("ss", b.ss) list L3 print endif # 5. one series into list within bundle catch list b.LL = s # fails ("expected list") # workaround: if $error list temp = s list b.LL = temp eval nelem(b.LL) eval varnames(b.LL) endif </hansl> Failure in 4 looks awkward in light of the working 3, and failure 5 looks a plain bug to me. Right? thanks, sven